I.—Notes on some Palæozoic Bivalved Entomostraca

The specimen here figured is an internal cast of a right valve, occurring in the well-known, reddish, fossiliferous, Palæozoic quartzite of the Triassic pebble-bed at Budleigh-Salterton, in Devonshire; and it resembles some forms of Cypridina brevimentum, J. and K. (“ Monogr. Carbonif. Entom.” Pal. Soc. 1874, p. 15, pl. 5, figs. 15–19), in general aspect; and also in some respects Polycope simplex, J. and K. (op. cit. p. 54, pl. 2, fig. 12). It was detected by the late Mr. J. W. Salter (in 1865?) during his enthusiastic study of that interesting conglomerate.