b. Integripalliata. 



15. Pamilia Cyprinidae. 



Genus Cyprina Lamarck. 



T. solida, ventricosa, concentrice striata, umbonibus antice 

 spiralite]- involutis; lunula obsoleta; cardo validus dentibus 3, 

 lateralibus valvae sinistrae distinctis; ligamento externo magno. 

 Sars. 



Cyprina islandica Linne. T. magna, tumida, ovato- 

 orbicularis, inaequilatera, ponderosa, crassa, epidermide crassa 

 castanea, in adultis nigra obtecta; extr. antica breviore, postica 

 subproducta, truncata, margine dorsali antico concavo ; umbones 

 magni, tumidi, antrorsum curvati ; lunula indistincta ; ligamentum 

 magnum, prominulum. — Long. 100 Mm. superans. 



Veims islandica Linue ed. 12 p. 1131. — (C.) Lam. VI p. 290. — 



Forbes et Haiiley I p. 441 T. 29, — Sow. 111. Ind T. 5, F. 1. - 



Jeffreys Br. Conch. II p. 304 T. 36, F. 2. - Locard Cat. p, 442. 



— Mart. Ch. II Veuus T. 5, F. 1, 2. — Sow. Thes. I T. 168 



F. 1-8. — Could et Bimiey p. 129 F. 443. 

 Cypriua vulgaris Sowerhy Geu. T. 38, F. 11. — Browu Conch. lU. 



T. 31, F. 1. 

 Pectunculus maximus Lister, P. crassus da Costa, Venus mercenaria 



Peun. nec L., Venus bucardium Boru, Cyprina arctica Bowditch. 



Hab. oceanum atlanticum borealem. 



16- Familia Cardiidae- 



1. G-enus Aphrodite Lea. 



T. magna, subtriquetra, postice vix hians, tenuiuscula, laevis 

 vel obsolete radiata, umbonibus medianis, prominulis; dentibus 

 cardinalibus obsoletis. 



Apbrodite groenlandica Chemnitz. T. modice 

 convexa, subcordata, tenuiuscula, fere aequilatera, postice oblique 

 subtruncata, margine ventrali aequaliter rotundato, dorsah utrin- 

 que declivi, laeviuscula, antice et postice tantum leviter radiatim 

 striata, albido-liavescens, in junioribus rubro tlammulata; um- 

 bones tumidi, fere mediani, ligamentum prominulum; cardo 

 debilis, dentibus subobsoletis. — Long. ad 70, alt. 50—55 Mm. 



