BIVALVE SHELLS. 5 



A. Testa orbicularis ; sinus pallii obliquvs, triangularis ; truchece 

 cvnnexcB ; pes subquadrangularis. Dosiniana, Gray. 



Genus 1. DOSINIA. 



Animal orbiculare, compressum ; pallium in margine plicatura ; 

 trachefe binae. connexae apertura simplici terminatte ; pes magnus 

 compressus, subquadrangularis, labiorum appendices angustae, 

 triangulares, intus profunde striato-lamellosse ; branchiae inaequa- 

 lissimae internae majores subquadratae. 



Testa orbicularis, lentiformis, concentrice striata, sub umbones 

 lunulata ; cardine utraque valva tridentato, dente lunulari elon- 

 gato, compresso; ligamentiim externum partim sub pube con- 

 ditum ; sinus pallii profundus, obliquus, triangulaiis, apice acii- 

 minatus. 



Pectunculus, Lister (1686), Syn. Conch. 



Concha rotunda, Gualtieri (1742), pi. 7^- 



Le Dosin, le Cotan (1757), Adans. Seneg. p. 224. 



Venus (spec.), Limne (1758), Syst. Nat. ed. 10. p. 689, 



Circumphalos (ex pai-te), Klein (1753), Ostrac. p. 146. 



Venus, Linn^ {\767], Sysf. Nat. ed. 12. p. 1134. 



Miiller (1776), Zodl. Dan. Prodr. p. 247. 



Born (1780), Mus. Vind. Test. p. 70. 7'i. 



Gronovius (1781), Zooph. Gronov. p. 271. 



Schroter (1783), Gmel. 1788, cVc. 

 Artemis, Poli (1791), Test. lit. Sicil. p. 98. t. 1. 



Oken (1815), Lehrb. der Naturg. p. 229. 



Blainv. (1825) Malac. subgenus Veneris, p. 556. [t. vi. 



Des/t.(1830) Encycl.MeVi.; i\H35) in Lamk. An. s. IWt.cd.-J. 



Aqassiz (1845), Icon, des Coq. Viv. Rep. Ident. p. 16. 



Nyst (1846), Coq. Foss. de Belg. p. 183. 



Gray (1838), Cat. Cyth. Analyst, t. viii. p. 308. 

 Cytherea (spec), Lamk. (1818) An. s. Vert. t. v. p. 572, 5/3. 



Tnrton (1822), Conch. Brit. p. 162. 



Fleming (1828), Brit. Anim. p. 445. 



Menke (1830), Syn. Meth. Moll. p. 116, &c. 



Macgilliv. (1844) Moll, of Scofl. p. 212, 263. 

 Dosinia, Scopoli (1777), Intr. ad His/. Nat. p. 399. 



Gray (1840), Syn, B. M.; (1847), Proc. Zool. Soc. p. 183. 



Sowerby (1842), Conch. Man. p. 141. 



Desk. (1849) Traife Flem. p. 610. 

 Orbiculus a, Megerle (1811), Mag. fur die neust. Entdeck. p. 58. 

 Exoleta, Brown. (1827), Conch. Text-book. 

 Asa, Leach (1819), MSS. 



Venus /3, Schumacher (1817), Essai d'un Nouv. Syst. p. 152. 

 Arctoe, Risso (1826), Eur. Me'rid. t. iv. p. 362. 

 Lucina (spec.), Lamk. (1818) An. s. Vert. t. v. p. 543. no. 13. 



