RISSOIDiE. 83 



Probably priority will have to be giveu to M. Audouiu's 

 name. 



var. microstoma [an R. microstoma, sp. nov. ?] 



Long. 4 J, diam. 2 mil. 



1 Oman [Persian G.] ; coll. W. T. Blanford, Esq. 



36. Rissoina scalariformis. 



Rissoina scalar! fomn is, C. B. Adams, Cat. Panama Shells, 1852, long. 3-3 

 lat, 1' 27 ; fide Schwartz, Panama and Mauritius, also probably smaller 

 var. Red Sea. 



var ? 

 4 W. Indies ? ; ex c. G, Nevill, Esq. [3, IJ]. 



37. Rissoina mainwaringiana, n. sp. 



10 Persian Gulf [type] ; ex c. Colonel G. B. Maiuwariug. 



38. Rissoina, n. sp. 



Long. 3, diam. 1 J mil. This cannot be any of Gould's spe- 

 cies ; it resembles the W. Indian B. firniuta, C. B. Adams. 



1 Hongkong; coll. R. Hmigc.'ford, Esq. (" very rare "). 



Section D. — Phosinella, MorcJi. 



Mai. Plat. XXIII, 1876, type P. pidchra, C. B. Ad. ; — Group IV, Schioartz, 

 I. c, page 39. 



There is a B. balteata, Pease, from Hawaii, long. 4, diam. 

 1-| mil. — perhaps = 12. exasperata, Soaverbie ? 



39. Rissoin cancellata. 



Risssoina cancellata, Philippi, Zeits. 1847, p. 127, Cuba — 3\. 



var. pulchra. 



Rissoina pulchra, C. B, Adams, Contr. Conch, p. 114, Jamaica ; fide March, a 

 distinct species. 



4 W. Indies j ex c. J. Wood-Mason, Esq. 



