Studies on cepaea, IV. Climate and selection of banding morphs in cepaea from the climatic optimum to the present day

A number of samples of subfossil Cepaea nemoralis and hortensis from sites in southern Britain of archaeological interest, ranging in date from about 4500 b .c . to Romano-British and Anglo-Saxon, have been scored for frequency of the major banding morphs, and compared with present-day samples taken on each site or as near to it as these species could be found. In C. nemoralis there is a significant decrease of unbandeds from pre-iron Age samples to the corresponding ones for the present day, but no indication of systematic change from Iron Age samples to the present day. Spread banded also shows changes from pre-iron Age samples to present-day ones, but very little change from the early Iron Age to the present day. The smaller samples of C. hortensis available give no sign of a trend although there is much change from pre-iron Age times to the present; Iron Age samples and the corresponding present-day ones do not show the relative constancy of composition seen in C. nemoralis —as usual these two very closely related species are behaving differently. At the present day there is evidence (experimental and distributional) that the frequencies of banding morphs of C. nemoralis are affected by climate, unbandeds and mid-bandeds being favoured by better summers than those normal in Britain at present. The available evidence, from pollen analysis and other sources, of changes in the climate of southern Britain in the last 6500 years suggests that the observed differences in morph frequencies can be related to known climatic changes, in agreement with present-day evidence. One area effect (south-west M arlborough Downs) has contracted and become less intense since pre-iron Age times, as perhaps have others; in some cases a site has remained in an area effect, but the effect itself has changed. Two pairs of samples from lowland sites appear to have changed from frequencies indicating area effects in pre-iron Age times to others consistent with visual selection at the present day. Area effects seem to have been rather constant from the Iron Age to the present day.

1931 ◽  
Vol 11 (4) ◽  
pp. 399-404
Author(s):  
E. Thurlow Leeds

In 1928 by courteous permission of Mr. Badcock, the owner, the Oxford University Archaeological Society, under the supervision of Mr. R. T. Lattey, was able to examine a site in a field bounded on the west by the road leading from Radley village to Abingdon and on the south by a second road leading eastwards towards Radley station. There, on the wall of a disused gravelpit, holes filled with earth had produced evidence of human occupation. Exploration of some of these resulted in the discovery of a series of trenches, the relation of which to one another could not be exactly determined owing to the limited area available for investigation. One piece of trench ran with a somewhat north-easterly trend up to the northern edge of the field, with a recessed pit about 4½ ft. across at one point, while a second longer stretch, after running in a north-westerly direction for a few yards, turned almost at right angles towards the south-west, and some distance farther on, at the point where the excavations had to cease, appeared to be bending southwards.


2021 ◽  
Author(s):  
Nick Stoodley ◽  

This book presents a study of the central and lower Medway valley during the 1st millennium AD. It takes as its focus the Eccles Roman villa and Anglo-Saxon cemetery, excavated between 1962–1976 and directed by Alec Detsicas. An account of this important villa throughout its long history is outlined, and a re-assessment of the architectural evidence which Detsicas presented, with fresh interpretations, is provided. In the middle of the 7th century, a large Anglo-Saxon cemetery was established south of the villa. It started as a typical ‘Final Phase’ cemetery but continued into the late Saxon period. The evidence from the cemetery is presented as a site report, with a burial catalogue, a discussion of the grave goods and a study of the wider aspects of mortuary practice. The monograph also includes a chapter on some fragmentary Iron Age evidence and a discussion of an Anglo-Saxon timber building and its relationship to the cemetery. The evidence from the villa and Anglo-Saxon cemetery is discussed within the context of the Medway valley, which highlights the important contribution that Eccles makes to archaeological knowledge. The significance of the area is further investigated by studies devoted to the pre-English place-names of the valley and the documentary evidence of the area during the Anglo-Saxon period. The volume concludes with a general discussion, which draws together all the strands of evidence and evaluates the significance of the Medway valley during the 1st millennium AD.


2018 ◽  
Vol 73 (1) ◽  
pp. 110-136
Author(s):  
Oliver Good ◽  
Richard Massey

Three individual areas, totalling 0.55ha, were excavated at the Cadnam Farm site, following evaluation. Area 1 contained a D-shaped enclosure of Middle Iron Age date, associated with the remains of a roundhouse, and a ditched drove-way. Other features included refuse pits, a four-post structure and a small post-built structure of circular plan. Area 2 contained the superimposed foundation gullies of two Middle Iron Age roundhouses, adjacent to a probable third example. Area 3 contained a small number of Middle Iron Age pits, together with undated, post-built structures of probable Middle Iron Age date, including a roundhouse and four and six-post structures. Two large boundary ditches extended from the south-west corner of Area 3, and were interpreted as the funnelled entrance of a drove-way. These contained both domestic and industrial refuse of the late Iron Age date in their fills.


2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Rachel Omagha ◽  
Emmanuel Taiwo Idowu ◽  
Chibuisi Gideon Alimba ◽  
Adetoro Olubunmi Otubanjo ◽  
Adeniyi Kazeem Adeneye

Abstract Background Combination of different antimalarials has become the popular method of care for malaria morbidity in conventional and traditional treatment approaches due to the need to increase the efficacy and reduce the selection of drug resistance. A worrisome concern is the critical gaps with regards to the information available on antimalarial herbal cocktails. This study presents cocktail herbal remedies in ethnomedicinal approaches to malaria treatment in Oyo and Ogun states, South West Nigeria. Ethnobotanical information on indigenous antimalarials used in combination remedies was collected from herbal practitioners using a semi-structured questionnaire. Results Findings showed majority of respondents treat malaria with combination herbal remedies. They sighted their beliefs and customs, the efficacy, affordability and availability of these herbs as reasons for their adoption of herbal medicines as their preferred mode of treating malaria. Enquiry revealed 26 sets of cocktail antimalarials from a variety of plant species. The plants and ingredients are extracted and used as decoction, infusion or steam baths. Oral route was the most popular mode of administration. Respondents reported they drink one to two medium-sized cups of the recipe on an average of two times daily within a duration of about 10 days. Conclusions Herbal antimalarial remedies continue to be the popular treatments option in our localities. This study provides knowledge of the diverse ways respondents combine medicinal herbs and other local ingredients for malaria treatment. Pharmacological screening is urgently needed to validate their safety and efficacy in order to protect the health of our locals heavily relying on them to combat high burdens of malaria.


Béaloideas ◽  
1944 ◽  
Vol 14 (1/2) ◽  
pp. 162 ◽  
Author(s):  
Liam Ua Broin ◽  
J. J. Hogan
Keyword(s):  

1951 ◽  
Vol 31 (3-4) ◽  
pp. 132-148 ◽  
Author(s):  
K. M. Richardson ◽  
Alison Young

In 1946 a visit to the barrow, which lies on the edge of the western scarp of Chinnor Common, and a cursory examination of the adjoining area, cultivated during the war, resulted in finds of pottery and other objects indicating Iron Age occupation. The site lies on the saddleback of a Chiltern headland, at a height of about 800 ft. O.D. Two hollow ways traverse the western scarp, giving access to the area from the Upper Icknield Way, which contours the foot of the hill, then drops to cross the valley, passing some 600 yards to the north of the Iron Age site of Lodge Hill, Bledlow, and rising again continues northwards under Pulpit Hill camp and the Ellesborough Iron Age pits below Coombe Hill. The outlook across the Oxford plain to the west is extensive, embracing the hill-fort of Sinodun, clearly visible some fourteen miles distant on the farther bank of the Thames. The hollow way at the north-west end of the site leads down to a group of ‘rises’ hard by the remains of a Roman villa, and these springs are, at the present day, the nearest water-supply to the site.


1959 ◽  
Vol 36 (4) ◽  
pp. 613-631
Author(s):  
J. S. RYLAND

1. Many species of Polyzoa show marked specificity with regard to the substrate on which they occur. Epiphytic forms are often found mainly on one species of alga. 2. Experiments were performed in which a number of algal species were offered to polyzoan larvae as substrates for settlement. The disposition of algae, and the dishes containing them, was such that the layout conformed to a Youden Square design. This not only achieved economy of materials, but ensured a balanced experiment, made possible a statistical analysis of the results, and eliminated any possible effects of extraneous environmental factors. 3. The larvae showed marked substrate preferences when settling. In the littoral forms Alcyonidium hirsutum, A. polyoum and Flustrellidra hispida, the selection of algae accorded closely with their observed natural distributions: in each case highest settlement took place on Fucus serratus. It seems probable that positive selection plays an important role in determining the distribution of these species on the shore. Celleporella hyalina larvae were also selective, but the preferences were less clearly related to the ecological distribution of the adult. 4. Surface texture appears more important than contour as a factor influencing the choice made by larvae between algal substrates, although the physical and/or chemical factors responsible for the observed differences in attractiveness of algae are largely unknown. However, it is evident that the nature of the surface alters with age, and that this influences favourability. The presence of mucus has an adverse effect on settlement. Once the actual substrate has been chosen, the larvae respond to surface contour and, if possible, select a groove or concavity as a site for fixation.


Antiquity ◽  
1955 ◽  
Vol 29 (114) ◽  
pp. 77-88 ◽  
Author(s):  
Kenneth Jackson

The archaeological background of the people of what is now Scotland south of the Forth and Clyde in the Roman period was a La Téne one, and specifically chiefly Iron Age B. This links them intimately with the Britons of southern Britain in the conglomeration of Celtic tribes who called themselves Brittones and spoke what we call the Brittonic or Ancient British form of Celtic, from which are descended the three modern languages of Welsh, Cornish and Breton. To the north of the Forth was a different people, the Picts. They too were Celts or partly Celts; probably not Brittones however, but a different branch of the Celtic race, though more closely related to the Brittones than to the Goidels of Ireland and (in later times) of the west of Scotland. Not being Brittonic, the Picts may be ignored here. Our southern Scottish Brittones are nothing but the northern portion of a common Brittonic population, from the southern portion of which come the people of Wales and Cornwall. Some historians speak of the northern Brittones as Welsh, following good Anglo-Saxon precedent, but this is apt to lead to confusion. The best term for them, in the Dark Ages and early Medieval period, as long as they survived, is ‘Cumbrians’, and for their language, ‘Cumbric’. They called themselves in Latin Cumbri and Cumbrenses, which is a Latinization of the native word Cymry, meaning ‘fellow-countrymen’, which both they and the Welsh used of themselves in common, and is still the Welsh name for the Welsh to the present day. The centre of their power was Strathclyde, the Clyde valley, with their capital at Dumbarton.


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