654 



wyUf &c. Venus triangularis, Mont., Test. Brit. p. 577. Cyprina 

 minima, Cyprina triangularis, Turton. Cythersea apicalis, Philip^u, 

 Moll. Sicil. vol. i. p. 40, pi. 4. f. 5. Cytheraja Cyrilli, PJiilippi, 

 Moll. Sicil. vol. ii. p. 32. Cythersea minuta, Brown, lUustr. 

 Conch, p. 92. pi. 37. f. 4. 



Cir. testa parva, lenticulari vel subtrigona, concentrice striata, 

 varie picta. 



This small species varies considerably in form, as well as in the 

 fineness of the concentric striae or ribs. From the entire absence 

 of diverging lines near the umbones, its place in this genus is 

 doubtful ; but from its entire resemblance in all other respects to 

 shells of the second section, we follow King, Hanley, &c., in 

 placing it here. 



South of Great Britain, and in the Mediterranean. 



LIST OF FIGUEES IN PLATES CXXXVII. TO CXXXTX. 



{The Figure after each name is the number of the Species.) 



Plate CXXXVII. 

 Fig. 



1-3. C. pectinata, 1. 

 4-7. — gibbia, 2. 

 8, 9. — divaricata, 3. 

 10, 11. — dispar, 5. 

 12-15, — sequivoca, 4. 

 16, 17. — austrahs, 6. 



Plate CXXXVIIl. 

 18-21. — minima, 16. 

 22-26. ~ undatina, 8. 



Fig. 

 27. C. nummulina, 9. 

 28-30. — tumefacta, 10. 

 31, 32. — plicatina, 11. 

 33-37. — plebeja, 15. 



Plate CXXXIX. 



38-43. — scripta, 7. 

 44, 45. — rugifera, 13. 

 46-48. — rivularis, 12. 

 49-52. — crocea, 14. 



