RIS80INA. 37^ 



Described as a Rissoa, but appears to be more nearly related to 

 this group. 



Un figured Species. 



R. TORNATiLis, Gould. ' Loochoo Is. 



R. LYRATA, Gould. Japan. 



R, MONiLiFERA, Nevill. Japan. 



R. suBANGULATA, C. B. Ad. Jamaica. 



Section Microstelma, A. Ads. 1863. 



R. DiEDALA, A. Ad. Unfigured. Japan. 



R. CONCINNA, A. Ad. Unfigured. Suez. 



This species is said to be a young shell, broken and worn, and to 

 = R. spirata, Sowb. 



Section Schwartziella, Nevill. 1884. 



R. Bryerea, Mtg. PI. 56, figs. 67, 71. 



Solid, subpellucid, shining, white, with about 18-22 longitudinal 

 slightly flexuous costre and equal smooth interstices, no spiral strife ; 

 whorls 7, suture a little undulated ; lip with a longitudinally striate 

 varix, rounded below\ Length, 5'5 mill. 



Cuba, Jamaica. 



First described, erroneously, as British. It is B. nitens, and R. 

 lactea, Brown. Probably R. scalarioides, C. B. Ad., is a synonym, 

 but the figure of that species given by Sowerby in Conch. Icon, 

 (fig. 71), is certainly dift'erent, and looks more like a worn Scalaria 

 lineata, Say. 



R. nivea, a. Ad. PI. 55, fig. 24. 



Subpellucid, wliite, shining, subdistantly, elevately, flexuously 

 plicate, obsolete anteriorly Avhere the whorl is spirally striate ; 

 whorls convex ; lip thickened, but scarcely varicose. 



Length, 3"7 mill. 



Port Lincoln, Australia. 



R. pseudobryerea, Nevill. PI. 56, fig. 70. 



Shell solid, white, with strong, wide, straight longitudinal ribs, 

 crossed by narrow, slight spiral striae ; whorls 8, flattened, a little 

 round-shouldered, suture distinct; lip varicose. Length, 5*5 mill. 



Red Sea. 



It is R. bryerea, Schwartz in part. 



