RissoiDJi:. 97 



Sub-Genus IBAVADIA, Blanford. 



J. Asiat. Soc, Bengal, 1867, p. 56, type I. ornata, Blf. ; fide Stoltczka, 

 belongs to suh-fam. Rissoince [anim. ign.']. 



88. Rissoina [Iravadia] ornata. 



Iravadia ornata, W. T. Blanford, J, Asiat. Soc, Bengal, 1867, Irawady 

 Delta. 



30 Pt. Cannino^ and Irawady Delta [typical] ; coll. W. T. Blanford 

 and J. Wood-Mason, Esqrs. 



89. Rissoina [Iravadia] trochlearis. 



Kissoina trochlearis, Gould, P. Bost. S. 1861, China Seas — axis 16, diam. 

 '073 poll. ; =R. annulata, Dunker, Japan. 



1 Japan ; ex c. Mr. Damon [coll. A. Adams ; labelled " Onoba cinguli- 



fera, A. Ad.»] 

 12 Hon^-Kone, under stones at extreme low water ; coll. R. Hungerford, 



Esq. [4, 2]. 

 40 Ceylon, Aden, Bombay, Andamans, Singapore, and Arracan j coll. 



F. Stoliczka and G. Nevill, Esqrs. 



var. minor. [? dist. sp.] 

 Conch.- Cab. II, pi. 15 B,fig. 2, 



Shell like tliat of a miniature i?. ornata, covered with a thin 

 epidermis. Thick, solid, without the minute, decussating strisa 

 of the preceding ; whorls six, the first two without sculpture, 

 the next two with two very strong spiral keels, the fifth with 

 three, the last of which is less developed than the other two, 

 the last with six of these sulcations"" ; outer lip much thickened, 

 fimbriated [as it were] by five of these projecting sulcae; 

 margins of aperture without any basal notch or canal, joined 

 by a callosity j columella nearly straight. 



Long. 3 J, diam. 1| mil. [Kesm], 

 Long. 3|, diam. 1| mil. [Hong-Kong]. 



