652 



9. Circe nummultna (pi. cxxxviii. f. 27). Cytheraa num- 

 mulina, Lamarck, no. 58. 



Cir. testa C. scriptee seu C. undatince simili, sed costulis diver- 

 gentibus omnino radiata. 



This may possibly be a mere variety of the preceding, with the 

 diverging rays spread nearly all over the shell. 



Locality unknown. Mas. Cuming. 



10. Circe tumefacta (pi. cxxxviii. f. 28, 29, 30), Sowerby, 



jun. 



Cir. testa subventricosa, subobliqua, marginibus medio subro- 

 tundatis, prope umbones inflata, leviter divaricatim costata; mar- 

 gine dorsali declivi, subcomplanato ; lunula complanata ; colore 

 albido, plerumque rufo-scripto. 



Shell a little more oblique and ventricose than C. undatina, 

 with a greater tendency to swell near the umbones, which are 

 slightly ribbed. 



Locality unknown. 



11. Circe plicatina (pi. cxxxviii. f. 31, 32). Cythersca 

 plicatina, Lamarck, no. 71. 



Cir. testa subventricosa, subobliqua ; marginibus subrotundatis ; 

 costis concentricis magnis, nitentibus, subcomplanatis ; lateribus 

 prope umbones divaricatim costatis. 



Shell shaped like C. tumefacta, but with the concentric ribs 

 broad, shining, and a little flattened. 



Indian Ocean and New Holland. 



12. Circe rivularis (pl.cxxxix. f.4G, 47, 48), Menke, ? 



Cir. testa complanata, alta, superue subangustata, alba, rubes- 

 cente, vel pallid e lutea vel fusco late radiata, intus rosea ; mar- 

 gine dorsali declivi, crentdato ; costis distantibus, irregularibus, 

 interstitiis complanatis. 



Shell flat, high, rather narrow towards the umbones, pinkish- 

 white, or yellowish, or pale brown with broad suffused radiating 

 bands of brown, pinkish within, ribs distant, with flattish inter- 

 vals ; lunule and dorsal area flattened, marked and crenulated by 

 the few diverging ribs near the umbones. 



New Holland and llain's Island. Captain Ince, B.N. 



13. Circe rugipera (pl.cxxxix. f. 44, 45). Cytheraea ru- 

 gosa, Lamarck, no. 70. Venus corrugata, Dillivyn. 



Cir. testa subcomplanata, postice subangulata, polita, prope 



