625 



45. Cyther^a SPATHULATA (pl.cxxxi. f.78, 79), 8owerhy,jmi. 



Cytli. testa C. Sinensi simili, sed altiore ; margine dorsali fusco 

 angulatim maculato ; disco fulvo, fusco interruptim radiato ; la- 

 tere fusco, unifasciato. 



Shell coloured like C. erycina, except that the margin is not 

 orange ; it is shaped like C. Sinensis, but with the dorsal margin 

 more elevated, and white, marked across with angular spots. 



Australia. The specimen figured from Mr. Cuming's collection 

 is the only one we have seen. 



46. Cythee^a impar (pl.cxxxi. f. 77), Lamarck, Anim. s. 

 vert. Cyth. no. 16. 



Cyth. testa subovali, crassa, laevi, alta, antice sulcata, omnino 

 fasciis fuscis violascentibus interruptis radiata, intiis violaceo 

 tincta ; margine dorsali livido, retuso, fusco maculato, subangu- 

 lato ; latere antico brevissimo, postico obtuso ; lunula excavata, 

 livida ; umbonibus maguis. 



Shell smooth at the back, ribbed in front, large and rather 

 angular at the dorsal margin and umbones, short in front, long 

 and obtuse behind; nearly white between the greyish-brown 

 interrupted rays ; dorsal margin livid ; lunule concave and livid. 



The peculiar characteristic of this shell is the obtuseness of the 

 posterior side, at the termination of the ventral margin. 



Australia. 



47. Cyther^a PESTiVA (pi. cxxx. f. 72), ? (tablet of 



Paris Museum). 



Cyth. testa subovali, crassa, laevi, antice sulcata, fulvo-rubes- 

 cente, lineis et fasciis rubris radiata ; latere antico brevi, postico 

 ad terminum subobtuso ; lunula impressa, rubra. 



Shell like C. impar, but not so high nor so thick at the umbones, 

 nor so obtuse at the posterior termination. The colouring is also 

 different, being composed of bands of light brown and pinkish- 

 white, crossed by radiating lines and bands of rose-red ; lunule 

 red and impressed. 



Locality unknown. The specimen figured is remarkably beau- 

 tiful, and belongs to Mr. Hanley. 



48. CYTHERiEA PECTORALis (pi. CXXX. f. 75), Lmmrck, Anim. 

 s. vert. Cyth. no. 18. 



Cyth. testa ovali, subelongata, subdepressa, coucentrice multi- 



4 M 



