bivalve shells. 33 



10. Cyclina? undata. B.M. 



C. testa orbiculari, sublenticulari, depressa, subrequilaterali, irre- 

 gulariter transversira striata, alba, ad apices SEepius lutescente ; 

 umbonibus tumidulis, acutis, brevibus ; lunula nulla ; valvis 

 intus candidis ; cardine angusto, in valva dextra bidentato, 

 altero tridentato; siau pallii maximo, profundissimo, apice 

 obtuso, basi lato, obliquissime ascendente. 



Venus undata, Pen7i. Brit. Zool. pi. 58. f. 9. 



Mont. Test. Brit. p. 117. 



Donov. Brit. Shells, iv. pi. 121. 



Mat. ^- Rack, Linn. Trans, viii. 86. 



Turt. Conch. Diet. p. 241. f. 94. 



Flem. Brit. Anim. p. 448. 



Dillw. Recent Shells, i. 197. 



Wood, hid. Test. pi. 8. f. 87- 



Phil. Moll. Sicil. ii. 34. 

 Mysia undata, Leach, Brit. Moll. 

 Tellina rotundata? Maton. 

 Petit, Journ. de Conch. 1821, p. 293. 



Venus sinuosa (monstr.), Penn. Brit. Zool. ed. 4. iv. 57- pi. 59. 

 f. 51 A. 



Mont. Test. Brit. p. 120. 



Mat. Sf Rack. Linn. Trans, viii. 90. 

 Lucina undata, Lamk. An. s. Vert. ed. 2. vi. 229. 



Turt. Dith. Brit. p. 115. 



Thorpe, Brit. Mar. Conch, p. 73. 



Brown, III. Conch. G. Br. p. 98. pi. 39. f. 1,2. 



Hanley, Recent Shells, p. 7^. 

 Venus incompta, Phil. Moll. Sicil. i. 44. pi. 4. f. 9. 

 Cytherea undata, Macgill. Moll. Aherd. p. 2()3. 

 Artemis undata. Alder, Cat. North, and Durham, Moll. p. 84. 

 Lucinopsis undata, Forbes Sf Hanley, Hist. Brit. Moll. Lite. 

 p. 435. pt. xi. pi. 28. f. 1, 2; et animal, pi. m. f. 2. 



Hab. Oceanus Europfeus. 



11. Cyclina TENUIS. 



C. testa orbiculari, requilaterali, Itevigata, convexo-depressa, tenui, 

 squalide alba, umbonibus prominentibus, antice inflexis, cas- 

 taneo tinctis ; lumda fere obsoleta, cordato-lanceolata ; valvis 

 intus albidis ; impressione musculari antica angusta, elongata, 

 arcuata, postica ovato-rotundata. 



Recluz, Journ. de Conch. 1852, p. 250. pi. 10. f. 1. 



Hab. Insula Guadalupensis. 



