98 RISSOID^E. 



60 Gwadar, Tavila and Kesra [Persian Gulf] ; coll. W. T. Blanford, Esq. 



4 Hong-Konof; coll. R. Hungerford, Esq. 

 20 Bombay ; coll. Rev. S. B. Fail-bank. 



1 Kathiawar; coll. F. Fedden, Esq. 



90. Rissoina [Iravadia] n. sp. 



2 Bombay; coll. Rev. S. B. Fairbank. [anfr. 7; long. 11 in.] 



Sub-Genus ISSELIELLA, Nevill. 



Issciia, O. Semper ms., ScTimeltz, Cat. Hus. Godeffroy, V [sine desc.], type 

 J^. mirabilis Dkr. [not Isselia,Bourg. Descr. nouv. Genres, tSfc.l877~\. 



Distinguished by the very distinct basal " canal " [or notch], 

 twisted columella and sinistrally bent, pyramidella-like apex. 

 Type Rissoina ? abnormis, Nevill. 



Perhaps Alvania bourguignati, Issel, belongs to this group ? 



A. Adams (ms.) and von Martens, in Mobius Keise Mauritius, 

 &c., consider these forms as allied to or part of Lachesis. 

 0. Semper, fide Schmeltz, placed them in the Family Planaxidce. 

 I feel convinced, and I believe Dr. Weinkauff is of the same 

 opinion, that they belong to the Rissoidce and are closely allied 

 to true Rissoina. 



91. Rissoina [Isseliella] mirabilis. 

 Rissoina mirabilis, Dunker, Cat. Mus. Godef. HI, Samoa Islands. 



3 Upolu ; ex Mus. Godeffroy. 



92. Rissoina [Isseliella] pseudoconcinna, n. sp. 



Rissoina concinna, Soio. [as of A. Adams, ms.'] in Con. Icon. 1819, pi. 1, 

 Jiff. 9, Japan [not R. concinna, A. Ad. 1851]. 



1 Japan, ex c. Mr. Damon [coll. A. Adams; labelled Lachesis 

 n. sp. !] 



93. Rissoina [Isseliella] abnormis. 



Rissoina ? abnormis, G. Nevill, Jour. Asiat. Soc., Bengal, 1875, p. 100, 

 pi. VIII, fig. 23, Mauritiuslong. 3, diam. JfJ mil. ; Lachesis sp. fide 

 Martens. 



