Illustrated Index of British Shells / Containing figures of all the recent species

by G. B. Sowerby

18. A. elliptica, Brown.—Crassina e., Crassina ovata, and C. sulcata. Scotland, 5 to 10 fath., mud, M. C. Oblong, smooth near the margin.

19. A. sulcata, Costa.—(Pectunculus) V. scotica and Damnoniensis, Crassina sulcata, etc.—Devon, Cornwall, Bantry, etc., C. Thickly ribbed.

20. A. compressa, Mont.—(Venus) Venus and Crassina Montagui, Cyprina comp.—Scarborough, Northumbria, Bantry Bay, Firth of Forth, 7 to 40 fath., M. C.

21. A. crebricostata, Forbes.—Zetland and Skye (dead), R. Ribs more numerous than in A. sulcata.

22. A. arctica, Gray.—(Crassina) Venus borealis, Astarte compressa.—Aberdeen, Zetland, St. Andrew's bay, etc., Rr. Lenticular, not ribbed.

Cytherea.

23. C. chione, Linn.—(Venus.)—Plymouth, S. Devon, Falmouth, Carnarvon, 12 to 20 fath., Mr.

PLATE V.