﻿144 



SUPPLEMENT TO THE CRAG MOLLUSCA. 



Venus fluctuosa, Gould. Supplement, Tab. IX, fig. 8. 



Venus fluctuosa, Gould. Invert. Massacb., p. 87, tig. 50, 1841. 



— — Delay. Nat. Hist. New York (Zool.), p. 222, 1843. 



— — S. P. Woodward. Geol. Mag., vol. i, p. 54, 1864. 

 Tapes — Binney. 2nd edit. Gould's Inv. Mass., p. 136, fig. 447. 



Spec. char. " Shell moderately small, transversely ovate, lenticular, rather thin. 

 Surface with 20 — 25 recurved concentrated waves, vanishing at the side ; areola none. 

 Middle tooth in each valve cleft. Epidermis thin, glossy, yellowish, beneath this white. 

 Length 0-8 ; breadth 0-22." 



Localities. Middle Glacial, Hopton. Upper Glacial, Bridlington. Recent, New- 

 foundland and Greenland. 



The specimen figured was obtained from the Middle Glacial sand of Hopton Cliff 

 by Mr. Dowson, and it is the only one in fair preservation that has occurred there ; but 

 small specimens somewhat worn, and portions of shells more or less worn, are not 

 uncommon at that locality. This shell has also occurred in the Bridlington bed, but I 

 do not know it from any other formations in Europe than that and the Middle Glacial of 

 East Anglia. 



Venus Gallina, Linne. Supplement, Tab. X, fig. 23. 



Venus Gallina, Linn. Syst. Nat., edit, xii, p. 1130. 

 _ _ En. Moll. Sic, vol. i, pp. 46, 48. 



— — J e ff re V s - Brit. Conch., vol. ii, p. 344, var. gibba? 



Locality. Post Glacial, Kelsey Hill. 



In Mr. Prestwich's paper on the Kelsey Hill deposit (' Geol. Journ.,' vol. xvii) is a 

 list of the shells by Mr. Jeffreys, among which is the name of Venus striatula, " a single 

 valve," and this specimen Mr. Prestwich has obligingly permitted me to have the use of 

 for the above illustration. 



This is of the more rounded form, corresponding in that respect with the Mediter- 

 ranean form of the species, and it has not the projecting termination on the siphonal 

 side like the British variety. It much resembles the figure in the * Ency. Meth.,' 

 pi. 28G, fig. 3, only that in our shell the concentric ridges are more distant. This may 

 probably be referred to the variety called by Mr. Jeffreys gibba, though our shell is not 

 very tumid. Philippi gives this species as recent from the Mediterranean and fossil from 

 the Sicilian beds. 



