PERISTERNIA. YO 



ance with their relationships. I have mainly followed this ar- 

 rangement, although it is certainly far from perfect. The 

 difficulty is, that whilst the genera hold good in a general way 

 as roughly indicating several great groups of species, there are 

 species which unite these characters in such manner that to ar- 

 range them in either group does violence to some of their 

 affinities. 



Besides Kohelt, Kiener and Reeve have monographed these 

 shells — the work of Kobelt being the most complete, and con- 

 taining most of the species which I shall here describe and 

 figure. 



Uenus PERISTERNIA, xMoich. 



P. PICTA, Reeve. PI. (U, fig. 39. 



White, more or less completely covered with chestnut, or 

 chestnut and orange narrow revolving lines ; columella and in- 

 terior of aperture blush color. Length, 1-1-25 inches. 



Viti Isles. 

 P. Belcheri, Reeve. PI. 04, fig. 40. 



White, with dark chocolate or blackish longitudinal flames or 

 blotches, and revolving bands; epidermis light yellow ; aperture 

 white witliin. 



Cargados Qarajos, Indian Ocean; on coral. Liukiu Is. 



Very closely allied to the preceding species. 



P. AUSTRALIENSIS, RcCVC. PI. fi4, fig. 41. 



White, ornamented between the ribs by dark chocolate square 

 blotches ; aperture yellowish, with two interrupted bold brown 

 bands. Length, 1'25 inches. 



Po7't Essington, Australia. 



P. Philberti, Recluz. PI. 64, fig. 42. 



Chocolate-brown, variegated and banded with white ; aperture 

 white or purplish within. Length, 1*25 inches. 



Philippines. 

 P. LoBBECKEi, Kobelt. PI. 64, fig. 4.3. 



White, base dark chocolate, with three more or less interrupted 



brown bands ; aperture rosaceous, columella stained with black. 



Length, 1 inch. 



Polynesia. 



