RISSOIA. 351 



Section CERATIA, H. and A. Adams, 1854. 



R. PROXIMA, Alder. PI. 63, fig. 82. 



Somewhat solid, a little shining, semipellucid, yellowish white ; 

 whorls 6, convex, with impressed suture, almost smooth, very 

 slightly spirally striate ; lip a little thickened, but not varicose. 



Length, 3 mill. 



Europe. 



R. striatula, Jeffreys and probably R. pupoides, Requien, are 

 synonyms. 



R. MACRA, Watson. PL 64, fig. 99. 



Imperforate, thick, subtransparent white, apex obtuse ; whorls 6, 

 rather flat, with narrowly margined suture, and slight spiral striae ; 

 outer lip sharp, very feebly varicose. Length, 2*5 mill. 



Off Nightingale Isl., Tristan da Cunha; 100-150 fms. 



R. TRUNCATA, Garrett. PI. 63, fig. 79. 



Imperforate, thin, pellucid, shining, white, apex blunt ; whorls 5, 

 slightly convex, closely spirally striate ; peristome thick, slightly 

 expanded. Length, 2 mill. 



Viti Is. 



Unfigured Species. 



R. PYRGULA, A. Ad. Gulf of Suez. 



R. MACCOYI, Tenison Woods. Tasmania. 



R. VARIEGATA, Tapparone. Papuan Is. 



Section HYALA, H. and A. Adams. 1854. 



R. VITREA, Mtg. PL 63, fig. 81. 



Imperforate, thin, semipellucid, yellowish white, smooth, very 

 lightly spirally striate, apex obtuse; whorls 6, convex, oblique, with 

 deep suture ; lip simple, thin, contracted. Length, 4 mill. 



Europe. 



It is R. glabrata, Fleming, R. crystallina and R. virginea, Brown. 



Unfigured Species. 



R. CONCINNA and R. NITIDA, A. Ad. Gulf of Suez. 



R. PUMILA, A. Ad. Gulf of Suez, Japan. 



R. GLABRATA, Phil. Japan,. 



