BIVALVE SHELLS. 97 



EnctjcL pl.271. tb a,h1 



Desh. Lamk. An. s. Vert. ed. 2. vi. 324. no. 65. 



Hanley, Descr. Cat. p. 108. 



Menke, Moll. Nov. Holl. p. 42. no. 245. 



An pectinata var. ? 



Hah. Nova HoUandia {Mmke). 



Genus 8. VENUS. 



Animal ovatum, turgidum ; pallium antice inferneque aper- 

 tum, postice clausum et tracheis binis brevibus disjunctis in- 

 sequalibus terminatum, in marginibus membranaceum profunde 

 complicatum ; trachea branchiaU breviori, duplici ordine tenta- 

 culorum coronata, tentaculis interioribus longioribus simplicibus 

 cylindraceis, exterioribus furcatisvel stellatis,brevTioribus; trachea 

 anali conica, tentaculis brevibus coronata, valvula conica, apice 

 aperta terminata ; labiae buccales parvae, triangulares, basi latse ; 

 pes magnus, triangularis, basi incrassatus ; branchise magnae, 

 insequales, subquadrangulares, plicatae, postice inter se conni- 

 ventes. 



Testa ovato-transversa, crassa, turgida, extus transversim sul- 

 cata vel lamellosa, margines tenue crenulati ; cardo incrassatus, 

 tridentatus, in utraque valva, dentes cardinales subaequales, diva- 

 ricatse, apice aliquando furcatse ; impressio pallii postice sinuosa ; 

 sinus ovato-subtriangularis, brevis, ssepius obhquus. 



Concha, Lmwe (1741), Faun. Suec. ed. 1. p. 381. 

 Pectunculus, Lister (1685), Conch. pl. 278, 284, 285, &c. 



Da Costa (1778), Conch. Brit. p. 185. 

 Cricomphalos, Klein (1753), Tentam. Ostrac. p. 146, 147. 

 Omphaloclathrum, Klein (1753), loc. cit. p. 148. 

 Quadi-ans, Klein (1753), loc. cit. p. 155. 

 Clonisse, Adanson (1757), Voy. au Seneg. p. 216. 

 Venus (ex parte), Liwwe (1758), Syst. Nat. ed. 10. p. 684; 

 (1767), ed. 12. p. 1128; (1761), Faun. Suec. ed. 2. p. 519; 

 (1764), Mus. Ulric. p. 497; (1771), Mant. Plant. p. 545. 



Chemnitz (1771), Conch. Cah. 



Pennant (1777), Brit. Zool. iv. 201. 



Muller (1776), Zool. Dan. Prodr. p. 246 



Scopoli (1777), Intr. ad Hist. Nat. p. 399. 



Born (1780), Test. Mus. Vind. p. 57- 



Gronovius (1781), Zooph. Gronov. p. 268. 



Schrbter, Gmelin, Barbut, Karsten, Olivi. 



Lamk. 1799, 1801, 1809, 1812, 1818, &c. 



De Roissy (1805), Buf. de Sonnini, vi. 328. 



