VIII.—On the Pectoral Fin of Cœlacanthus

1901 ◽  
Vol 8 (2) ◽  
pp. 71-72 ◽  
Author(s):  
Edgar D. Wellburn
Keyword(s):  
New South ◽  
New South Wales ◽  
Geological Survey ◽  
Pectoral Fin ◽  
Anterior Border ◽  
Pectoral Fins ◽  
Anterior Half ◽  
South Wales ◽  
Fin Rays ◽  
Distal Border

Among the fossil fishes of the Talbragar Beds (Jurassic?) described by Dr. A. Smith Woodward in a memoir of the Geological Survey of New South Wales (1895), there is the ventral portion of the abdominal region of a Cœlacanth fish, having one of the pectoral fins well shown. The fin is shown in counterpart, and is thus described:— “It exhibits, as usual, the characteristic obtuse lobation and the large fringe of articulated attenuated dermal rays, and is unique in displaying some of the eudoskeletal supporting bones. These elements seem to have been well ossified, though with persistent cartilage internally. At the base of the fin there occurs a broken fragment of bone1 incapable of determination; but in the lobe of the fin itself there is a series of four well-defined, hourglass-shaped supports. Of these bones the anterior three are much elongated, and nearly equally slender, while the fourth is much more robust and expanded at its distal end. The four elements radiate from the anterior half of the base of the fin; and it seems very probable that some smaller cartilage behind and near the distal border of the lobe have disappeared from lack of ossification. The fin-rays gradually increase in length from the anterior border to the middle of the lobe, whence they decrease again backwards, and finally become extremely delicate.”

scholarly journals Geological Survey of New South Wales: New products and data

Preview ◽  
2019 ◽  
Vol 2019 (201) ◽  
pp. 17-19
Author(s):  
Astrid Carlton ◽  
Giovanni Spampinato ◽  
Trisha Moriarty
Keyword(s):  
New South ◽  
New Products ◽  
New South Wales ◽  
Geological Survey ◽  
South Wales

On the Discovery of Leucite in Australia

1887 ◽  
Vol 7 (35) ◽  
pp. 194-195 ◽  
Author(s):  
J. W. Judd
Keyword(s):  
New South ◽  
New South Wales ◽  
Early Period ◽  
Geological Survey ◽  
Limited Distribution ◽  
Space And Time ◽  
South Wales

The mineral Leucite has for so long a period been considered as one of the most remarkable examples of limited distribution both in space and time, that the discovery in Australia of a rock largely composed of this mineral, by Mr. T. W. Edgeworth David, F.G.S., of the Geological Survey of New South Wales, is one that appears deserving of being at once placed upon record.Leucite-crystals, under the head of "white garnet," or "white schorls," appear to have been known from a very early period ; and, indeed, the fine examples from Somma could scarcely fail to attract the attention of the older mineralogists. Subsequently it was found that the mineral occurs in other parts of Italy, and especially the neighbourhood of Rome, as well as at the Laacher See and the Kaiserstuhl.

scholarly journals Eminent Living Geologists: Professor Sir T. W. Edgeworth David

1922 ◽  
Vol 59 (1) ◽  
pp. 4-13
Author(s):  
T. W. Edgeworth David
Keyword(s):  
New England ◽  
New South ◽  
New South Wales ◽  
The State ◽  
Geological Survey ◽  
Classical Scholarship ◽  
South Wales ◽  
The Rich ◽  
Western Portion

Professor Sir Edgeworth David was born in 1858 at St. Fagan's Rectory, near Cardiff, and was educated at Magdalen College School, Oxford, becoming head of the school and captain of the football and boat clubs. In 1876 he was elected to the Senior Classical Scholarship at New College, Oxford, and graduated in 1880, having won further distinctions in classics and in athletics. He had included in his studies a course of geology under Professor Prestwich, and had commenced in South Wales his life-long research upon the problems of glaciation. His geological studies were continued in London under Professor Judd, at the Royal School of Mines, and in 1882 he was appointed to the Geological Survey of New South Wales, under the late Mr. C. S. Wilkinson. On his arrival in Sydney in November of that year he made an investigation of the very fossiliferous Silurian beds of Yass, and shortly afterwards commenced the study of the rich tin-bearing deep-leads and alluvium of New England, completing a large quarto memoir thereon in 1887. His duties led him to visit many pirts of the State, but attention was now devoted chiefly to the Survey of the Hunter River Coalfield, which has occupied much of his time ever since; indeed, part only of his researches thereon has yet appeared. This investigation has been of immense value both economically and scientifically. The western portion, or Maitland coalfield, the extension of which was discovered during his survey, has proved the most important coalfield in Australasia.

New Remigolepis (Placodermi; Antiarchi) from Canowindra, New South Wales, Australia

1997 ◽  
Vol 134 (6) ◽  
pp. 813-846 ◽  
Author(s):  
ZERINA JOHANSON
Keyword(s):  
New South ◽  
New South Wales ◽  
Internal Surface ◽  
Single Species ◽  
Late Devonian ◽  
Transverse Ridge ◽  
East Greenland ◽  
Pectoral Fins ◽  
Internal Morphology ◽  
South Wales

Remigolepis walkeri sp. nov. from the Mandagery Sandstone (late Devonian) near Canowindra, New South Wales (NSW), is the second species of Remigolepis to be described from Australia, the first being from near Grenfell, NSW. Remigolepis walkeri possesses unusual paired suborbital plates with a large oval structure at the anteromesial edge of the plate, representing an attachment for the autopalatine portion of the palatoquadrate. Among asterolepidoids, this morphology is most similar to Pterichthyodes. Suborbitals of Remigolepis from East Greenland are said to possess a transverse ridge on the internal surface, similar to the bothriolepids Bothriolepis and Nawagiaspis. However, some specimens from East Greenland may show a morphology more similar to Remigolepis walkeri. The internal morphology of the suborbital plates is constant in the population of Remigolepis from the Canowindra locality, suggesting the presence of a single species despite the presence of more than 1000 individuals in this fauna. The morphology of the caudal fin of Remigolepis walkeri is similar to Remigolepis sp. from near Eden, NSW, and Asterolepis ornata, but differs from Remigolepis sp. from China. The morphology of the pectoral and caudal fins of R. walkeri indicate a bottom-dwelling lifestyle, whereas Bothriolepis from the same fauna may have been able to generate sufficient lift from the pectoral fins to enter the water column on a regular basis.

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