RISSOIDJI. S3 



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

 name. 



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



Long. 4J, diam. 2 mil. 



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



36. Bissoina scalariformis. 



Rissoina scalariformis, 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, H]. 



37. Bissoina mainwaringiana, n. sp. 



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



38. Bissoina, n. sp. 



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

 cies ; it resembles the W. Indian R.firmatiij C. B. Adams. 



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



SECTION D. PHOSINELLA, MorcJi. 



Mai. Slat. XXIII, 1876, type E. pulchra, C. B. Ad. ; = Group IV, Schwartz, 

 I. c., page 39. 



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

 1J mil. perhaps = 22. exasperata, Souverbie ? 



39. Bissoin cancellata. 



Risssoina cancellata, Philippi, Zeits. 1847, p. 127, Cuba 3%. 



var. pulchra. 



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

 distinct species. 



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



