80 RISSOIDA. 
1 Mauritius ; coll. G. Nevill, Esq. 
12 Kesm [Persian G.]; coll. W. T. Blanford, Esq. 
Long. 64, diam. 2 4. 
var.? (dist. sp. ?] 
12 Bombay, Tumb I, and Gwadar ; coll. W. T. Blanford, Esq. (62, 22]. 
I can see no trace of spiral striation, but the specimens are 
all in most wretched condition. 
They may be a var. of 2. bertholeti, but the ribs are irregular- 
ly flexous instead of regularly perpendicular, and a little more 
numerous; it is also a more attenuate shell. 
26. Rissoina turricula, 
Rissoina turricula, Pease, P. Zool. S., 1860, Sandwich I, 
1 Sandwich Isl. [typical] ; coll. W. Pease, Esq. [81, 14]. 
2 Mauritius; coll. G. Nevill, Esq. 
1 Roweiah, Red Sea; coll. J. B, Baxter, Esq. 
var. cernica, Nevill. 
Long. 23, diam. 1 mil. 
10 Mauritius; coll. G. Nevill, Esq. 
var. ceylonica, Nevill. 
2 Galle [type var.]; coll. J. B. Baxter, Esq. 
Long. 3, diam. 1 mil. 
Whorls 63, two apical ones smooth, the others somewhat 
convexly turriculate, with flexuous, rather distant, well-developed, 
longitudinal ribs, the last of all with a basal, subgranulose, 
transverse keel, with two transverse, fine, but distinct, strie 
above it ; basal emargination of aperture well marked; peristome 
callously thickened ; throughout, almost microscopically, trans- 
versely striate. 
