190 BIVALVE SHELLS. 



bidentatus ; dentibus minimis, approximatis vix divergentibus ; 

 ligamentum externum. Impressiones musculares magnae, ovato- 

 semilunares ; impressio pallii postice sinuosa ; sinus latus, parum 

 profundus, subtrigonus, horizontalis. 



Concha trifidos, Gualtieri (1742), Ind. Test. pl. 95. f. A. 

 Donax, Lmw. (1758) Syst. Nat. ed. 10. p. 682; (1767) ed. 12. 

 p. 1128. 



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



Chemnitz (1782), Conch. vi. 271. 

 Cuneus, Da Costa (1778), Conch. Brit. p. 204. 

 Venus, Chemnitz (1784), Conch. vii. 50; (1788) x. 357. 



Gmelin (1788), p. 3269. no. 147. 



Schrbter (1783), Einl. iii. 173. 



Brocchi (1814), Conch. Foss. Suhap. ii. 559. 



Cortesi (1819), Saggi Geol. p. 40. 

 Venus saxatilis, Fleurian de Bellevue (1802), Mem. sur les Moll. 



Perfor. p. 4. 

 Rupellaria, Renieri (1807), Tavole di Regni Aniwt. t. 7 (non 

 Bellevue). 



Brocchi (1814), Conch. Foss. Subap. ii. 546. no. 9, 24, 25 

 (non Bellevue). 



Turton (1822), Dithyr. Brit. 



Gray (1847), Proc. Zool. Soc. p. 184. 

 Venerirupis, Sowerby,jun. (1839) Conch. Man. p. 113. 



Veroni (1846), Cat. An. Everteb. p. 13. 

 Venerupes, Swainson (1842), Malac. Mon. p. 376. 



Synopsis Specierum. 

 I. Speeies lamellosae. 



a. Lcevigatce, 1, 2. 



b. Longitudinaliter sfriatcB, 3-13. 

 II. Species striatee vel decussatae, 14-19. 



I. Species lamellosce, 

 a. LcBvigat(B. 



1. Venerupis Cordieri. 



V. testa ovato-transversa, inaequilaterali, inflato-cylindracea 

 transversim eleganter lamellosa ; lamellis postice latis, por- 

 rectis, in medio attenuatis, antice evanescentibus ; cardine 

 lato, bidentato ; marginibus integris, acutis. 



