98 RISSOIDA. 
60 Gwadar, Tavila and Kesm [Persian Gulf]; coll. W. T. Blanford, Esq. 
4 Hong-Kong; coll. R. Hungerford, Esq. 
20 Bombay ; coll. Rev. 8. B. Fairbank. 
1 Kathiawar; coll. F. Fedden, Ksq. 
90. Rissoina [Iravadia] n. sp. 
2 Bombay; coll. Rev. S. B. Fairbank. [anfr. 7 ; long..14m.] 
Sub-Genus ISSHLIELLA, Nevill. 
Isselia, O. Semper ms., Schmeltz, Cat. Mus. Godeffroy, V [sine dese.|, type 
R. mirabilis Dkr, [not Issetia, Bourg. Deser. nour, Genres, &v. 1877]. 
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 M6bius Reise Mauritius, 
&c., consider these forms as allied to—or part of—Lachesis. 
O. Semper, fide Schmeltz, placed them in the Family Planawide. 
I feel convinced, and I believe Dr. Weinkauff is of the same 
opinion, that they belong to the Rissotide and areclosely allied 
to true Rissoina. 
91. Rissoina [Isseliella] mirabilis. 
’ Rissoina mirabilis, Dunker, Cat. Mus. Godef. III, Samoa Islands, 
3 Upolu; ex Mus, Godeffroy. 
92. Rissoina [Isseliella] pseudoconcinna, n. sp. 
Rissoina concinna, Sow. fas of A. Adams, ms.] in Con. Icon. 1879, pl. 1, 
Jig. 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. 
hissoina? abnormis, G. Nevill, Jour. Asiat. Soc., Bengal, 1875, p. 100, 
pl. VILL, fig. 23, Mauritius—long. 3, diam. 14 mil.; Lachesis sp. jide 
Martens. 
