98 RISSOlDiE. 



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



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

 20 Bombay ; coll. Rev. S. B. Fairbank. 



1 Katbiawarj coll. F. Fedden, Esq. 



90. Rissoina [Iravadia] n. sp. 

 2 Bombay; coll. Rev. S. B. Fairbank, [anfr. 7; long. l|m,] 



Sub-Genus I8SELIELLA, Nevill. 



Isselia, 0. Semper ms., SeJimeltz, Cat Mus. Godeffroy, V \_sine descj], type 

 R.mirahiUs Dkr. [not Isselia, Boury. Descr. nouv. Genres, S(c.l877'\. 



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

 twisted columella and sinistrally bent, pyramidella-like apex. 

 Type Bissoina ? abnormis, Nevill. 



Perhaps Alvania hourguignati, Issel, belongs to this group ? 



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

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

 0. Semper, ^£?e Schmeltz, placed them in the Familj Planaxidce. 

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

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

 to true Bissoina. 



91. Rissoina [Isseliella] mirabilis. 



Rissoina mirabilis, DtmJcer, Cat. Mus. Godef. Ill, Samoa Islands. 

 3 Upolu ; ex Mus. Godeffroy. 



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



Rissoina concinna, Soio. [as of A. Adams, ms.'\ in Con. Icon, 1879, pi. 1, 

 Jiy. 9, Japan [not B. 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, Benyal, 1875, p. 100, 

 pi. VIII, Jiy. 23, Mauritius — lony. 3, diam. 1^ wH. ; Lachesis sp. fide 

 Martens, 



