Kg- 



gadllana, Listen, compressa. — Scarborough, Southend, Swansea, 

 Cork, Clyde, C. Broad, compressed. 



DOXAX. 



19. D. ANATiNUS, La,mk. — B. irunculus, Linn.?, Cttnetis vittatus, B. 



ruber (young) . — Brit. co. generally, sandy shores, C. Broad ; 

 margin crenulated. 



20. D. POLiTUS, Poci. — [TeUina) B. a.ndi Capsa complanata. — S.Devon, 



Bantry Bay, etc., Mr. Smooth ; inner edge not crenated. 



Mactra. Lives on sandy beaches. 



2L M. STWiORVN, Litin. — [Cardium) Tellina radiata,Tri(jonellar.,M. 



cinerea, M. magna. — British co. generally, C. 

 ■22. M. ELLIPTICA, i?rci«'».— British co. generally, C. Oval. 



23. M. SDBTRUNCATA, Costa. — M. lactea, M. triangiila, M. crassatella. 



— Brit. CO. generally, C. Obliquely cuneiform. 



24. M. HELVACEA, Clietun. — 31. glavca, M. neapolitana. — Odd valves 



found dead in Cornwall, R. Large, obliquely oval. 



25. M. soLiDA, Linn. — Trigonella zonaria and gallina. — Brit. co. ge- 



nerally, C. Trigonal, thick. 



26. M. TRUNCATA, Mont. — Forth, Cork, Cornwall, etc., C. Trigonal, 



deep, thick. 



