t^^l

74 PALU"DESTEiyiD,T3.
sculpture, almost white, with a veiy slight hrowuish tinge here
and there, suture very distinct, spire eloiigatelj^ drawn out, apex
rather obtvise; whorls 4g, convexly ventricose, the last one
tumidly and globosely swollen, about the same size as the others
together, a distinct opaque varix ou the left-hand side (away
from the aperture) on each side of the two last whorls ; aperture
nearly round, not oblique, with scarcely thickened, convex,
peristome, and columellar margin nearly straight, subangulate
at base.
Very variable in size. Type : Alt. 6, diam. 4 mm.
Hab. Kutch.
Type in Indian Museum, Calcutta.
A thinner form designated by Nevill, var. tenuinr, also occurs
in the same locality,
147. Bithynia inconspicua, Dohm.
Bithynia inconspicua, Dohrn, P. Z. S. 1857, p. 123 ; H. & T., 0. I.
pi. 37, figs. 5, 6.
Original description ;—Testa obloiigo-conica, tenera, alba vel
fulva, pellucida ; spira acuta; anfractus 4-5 convexiusculi, sub »
lente leviter longitudinaliter striati; apertura oblonga. Operculum
testaceum, concentricum.
Alt. 5, diam. 3'5 mm.
Aperture: alt. 2'5, diam. 1'75 mm.
Ilah. Ceylon.
148. Bithynia orcula, Benson.
Bithynia orcxda, Benson, jUSS. in Frauenfeld, Verhandl. zuol.-bot.
. Wien, 1862, p. 1154; H. &. T., C. 1. pi. 38, iigs. 8, 9.
Shell very convex, globosely conic, scarcely perforate, milkwhite,
smooth though httle polished; wliorls 4, slightly rounded
with the exception of the last which is considerably swollen;
aperture large, roundly ovate ; columellar margin somewhat
reflexed; operculum weakly convolute, rather concave with
central nucleus.
Alt. 6'4, diam. 5 mm.
Hab. Purneah (Con. Icon.).
Nevill in his ' Hand List,' pp. 36-37, cites several varieties
without other descriptions than those contained in the names
themselves ; these are as below :—
Var. minor.
Eah. Orissa {'Ball).
Var. prcducta.
Hab. Sambhar and Salt-Lakes (Sloliczka'):, Jamalpur (-S;o?(«/i-a);
Ferozpur {Ttnqde).
The dimensions of the latter are :—Alt. 7, diam. 5-25 mm.