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 It. Angasi. 



R. MAINWARINGIANA, Nevill. Unfigured. Persian Gulf. 



Section PHOSINELLA, Morch. 1876. 



K. 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. PL 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. PL 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. 



