RISSOIDiE. 83 



Probably priority will have to be given to M. Audouin's 

 name. 



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



Long. 4|^, diam. 2 mil. 



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



36. Rissoina scalariformis. 



Rissoina scalariformis, C. B. Adams, Cat. Panama Shells, 1852, long.' 3'3 

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

 var. lied Sea. 



var ? 

 4 W. Indies ? j ex c. G. Nevill, Esq. [3, 1^]. 



37. Rissoina mainwaringiana, n. sp. 



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



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. firmata, C. B. Adams. 



1 Hongkong ; coll. R. Hungevford, Esq. (" very rare "). 



Section D. — Phosinella, Morch. 



Mai. Plat. XXni, 1876, type E. pulchra, C. B. Ad. ; = Group IV, Schioartz, 

 I. c, page 39. 



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

 IJ mil. — perhaps = JS. exasperata, Souverbie ? 



39. Rissoin cancellata. 



Risssoina cancellata, Philippi, Zeits. 1847, p. 127, CuhaSh 



var, pulchra. 



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

 distinct species. 



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



