98 RTSSOID.T!. 



60 Gwadar, Tavik miuI Kcsm [Persian Gulf] ; coll. W. T, Blaiiford, Esq. 



4 Hong-Koujr; coll. H. Huucrertbrd, Esq. 



20 Bombay ; coll. llev. S. B. Fairbauk. 



1 Kathiawar; coll. P. Feddeu, Esq. 



90. Rissoina [Iravadia] n. sp. 



2 Bombay; coll. Rev. S. B. Fairbank. [aiilr. 7; long. Ijui.] 



Sub-Genus ISSELIELLA, Nevill. 



Isselia, 0. Semper ms., Schmelfz, Cat. 3Ius, Godeffroy, V \^sine desc.'], type 

 R.mirahilis JDkr. \_not Isselia, Bourff. Descr. nouv. Genres, 4*f. iS77]. 



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

 twisted columella and sinistrally bent, pyramidella-like apex. 

 Type Blssoina ? abnormis, Nevill. 



Perhaps Alvania hourgidgnati, Issel, belongs to this group ? 



A. Adams (ms.) and von Martens, in. Mobius Reise Maui'itius, 

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

 O. Semper, /zfZe Schmeltz, placed them in the ¥a:m\\j Planaxidm. 

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

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

 to true Rissoina. 



91. Rissoina [Isseliella] mirabilis. 



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

 3 Upolu ; ex Mus, Godutlroy. 



92 Rissoina [Isseliella] pseudoconcinna, n. sp. 



Rissoina concinna, Sow. [as of A. Adams, ms.'] in Con. Icon. 1S19, pi. 1, 

 Jifj. 9, Japan [not It. concinna, A. Ad. 1851]. 



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

 n. sp. !] 



93. Rissoina [Isseliella] abnormis. 



Rissoina ? abnormis, G. Nerill, Jour. Aslat. Soc, Bengal, 1S75, p. 100, 

 pi. VIII, Jiff. 23, Mauriiius — lonff. 3, diam. 1^^ mil. ; Lachesis sp.Jide 

 Martens. 



