BIVALVE SHELLS. 9/ 



Encycl. pi. 271. tb a,b1 



Desk. 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. ? 



Hab. Nova Hollandia {Menke). 



Genus 8. VENUS. 



Animal ovatum, turgidum ; pallium antice inferneque aper- 

 tum, postice clausum et tracheis binis brevibus disjunctis in- 

 sequalibus terminatum, in marginibus meml)ranaceum profunde 

 complicatum ; tracbea branchiali breviori, duplici ordine tenta- 

 culorum coronata, tentaculis interioribus longioribus simplicibus 

 cylindraceis, exterioribus furcatisvel stellatis,brevioribus; trachea 

 anali conica, tentaculis brevibus coronata, valvula conica, apice 

 aperta terminata ; labiai buccales parvse, triangulares, basi latse ; 

 pes magnus, triangularis, basi incrassatus ; branchiae magnae, 

 inaequales, subquadrangulares, pUcatae, postice inter se conni- 

 ventes. 



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

 cata vel lanaellosa, margines tenue crenulati ; cardo incrassatus, 

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

 ricatae, apice aliquando furcatse ; impressio pallii postice sinuosa ; 

 sinus ovato-subtriangularis, brevis, saepius obliquus. 



Concha, Linne {174\), Faun. Suec. ed. 1. p. 381. 

 Pectunculus, Lister (1685), Co7ich. pi. 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. 

 Quadrans, Klein (1753), loc. cit. p. 155. 

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

 Venus (ex parte), Linne (1758), Syst. Nat. ed. 10. p. 684 : 

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

 (1764), 3Ius. Ulric. p. 497; (1771), Mant. Plant, p. 545. 



Chemnitz (1771), Conch. Cab. 



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



Mitller (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. 



Schroter, Gmelin, Barbut, Karsten, Olivi. 



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



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



