BIVALVE SHELLS. \9U 



\ 



Nymphae magnac, arcuatae, ligamentura externum, crassum, elori- 

 gatum accipientes. Impressio pallii simplex, postiee paulo latior. 



Veneres, pt., Ferussac, Tab. Syst. p. 44 (1821). 

 Couchse marinae, pt., Lamk. 

 Veneraceae, pt., Menke, Syn. ed. 2. p. 114. 

 Veneridffi, pt., Leach, Journ. Phys. 1819, p. 465. 



Flem. Brit. Anim. p. 409. 



Gray, Stjn. B. M. 1842, pp. 74, 91. 

 Venerina, pt , Macgill. 

 Veneraceae, Menke, Syn. 69. 

 Cycladina, pt., Latr. Fam. Nat. 1825. 

 Cyclas, sp.. Cm. R. A. ed. 2 (1830). 

 Cyprinidae, pt., Forbes Sf Hartley, Brit. Moll. p. 239. 

 Cyprinadae, Gray, Ann. §- Mag. N. H. 1853. 



The front hinge tooth of the left valve conical, rugose, like the 

 anterior lateral tooth of the genus Venus ; the hinder of the 

 left valve thin, compressed ; the central of the right valve com- 

 pressed ; the hinder very broad, with a deep groove ; anterior 

 lateral tooth none ; hinder of right valve compressed, separated 

 from the dorsal margin by a deep groove. — Gray, Ann. &■ Maa. 

 N. H. 1853. ^ ^ 



Genus 1. CYPRINA. 

 (Character same as of family.) 



Concha, Lister (16/8), Anim. Angl. p. 173. pi. 4. f. 22. 

 Pectunculus, Lister (1685), Conch, pi. 272. 



Da Costa (1778), Conch. Brit. p. 183. 

 Venus (sp.), Litt».(1767) Syst. Nat. ed. 12. p. 1131. no. 124. 



Muller (1776), Zool. Dan. Prodr. p. 246; (1788) Faun. 

 Suec. i. 29. pi. 28. 



Fabricius (1780), Faun. Grmil. p. 411. 



Montagu (1803), Test. Brit. p. 104. 



Sow. (1813) Min. Conch, pi. 21. 

 Cardia, Olafsen (1774), Voy. en Isl. p. 96. pi. 11. f. 8. 

 Arctica, Schumacher (1817), Essai, p. 145. pi. 13. 



Sow.jun. (1842) Conch. Man. p. 73. 

 Cyprina, Lamk. (1812) Extrait du Cours, p. 107 ; (1818) An. s. 

 Vert. V. 556. 



I. Cyprina islandica. B.M. 



C. testa ovato-turgida, cordata, inaequilaterali, antice rotundata. 

 postiee obscure subangulata, intus albo-cretacea, extus epi- 

 dermide fusco-virente, nitido, striato vestita; cardine lato. 

 .sohdo ; dente anteriore pyramidali, triangulari. 



