RISSOINA. 381 



shouldered, with impressed suture ; lip slightly thickened, colum- 

 ella truncately twisted. Length, 15 mill. 



Sydney, Australia. 



Gould's description was made from an immature specimen (fig. 

 1) ; Angas subsequently described it as R. turricula, which being 

 preoccupied by Pease, the latter changed to R. Angasi. 



R. MAINWARINGIANA, Nevill. Unfigured. Persian Gulf. 



Section PHOSINELLA, Morch. 1876. 



i 



R. CLATHRATA, A. Adams. PI. 57, fig. 79. 



Solid, white, a little shining, clathrate by longitudinal and spiral 

 ridges ; whorls 9-10, slightly convex, the last whorl with a basal 

 sulcus and rib below it ; lip varicose, subchanneled below. 



Length, 12 mill. 



Red Sea, Singapore, Philippines, Australia. 



R. BICOLLARIS, Schwartz. PL 57, fig. 80. 



Solid, white, with 18-20 longitudinal, clathrate by spiral ridges, 

 about 8 of the latter on the last whorl. , Length, 7 mill. 



West Indies. 



R. FENESTRATA, Schwartz. PI. 57, fig. 81. 



Solid, white, with 12-14 longitudinal, crossed by spiral lirse, of 

 which there are 5 on the last whorl, intersections nodose ; lip vari- 

 cose, the varix strongly transversely ridged. Length, 4'3 mill. 



West Indies, Florida. 



R. CANCELLATA, Phil. PI. 57, figs. 84, 95, 82, 83. 



White, cancellated, with 16-18 longitudinal and 7-8 spiral rib- 

 lets on the last whorl ; whorls convex, with deep suture, base with 

 a sulcus, below which are three spiral ribs. Length, 3*3 mill. 



West Indies. 



R. Philippiana, Pfr. (fig. 95) is a synonym. 



Var. PULCHRA, C. B. Ad. Figs. 82, 83. 



White, with two distant yellowish bands, cancellated, with 20-22 

 longitudinal and 7 spiral ridges in the last whorl, the intersections 

 nodose, basal sculpture as in the type. Length, 5'3 mill. 



West Indies. 



