t^^l

Var. parvula.
Hah. Moradiibad ; Jaunpur.
Var. acuminata.
BITIIYXIA.
Hab. Andamsinti"! (Eoepstorff).
149. Bithynia nassa, Theohald.
Bithynia nassa, Theobald, J. A. S. B. xxxiv, pt. 2, 18R5, p. 275 ;
op. cit., xxxix, pt. 2, p. 404, pi. 18, fig. 8; H. & T., 0. I. pi. 37,
figs. 8, 9.
Original description :—Testa elongata, f iirbinata, polita, diaphana,
solidiuscula. Labio expansiusculo, pliya callosa externa munita.
Anfractibus quinqne.
Alt. 10-25, diam. 6-25 mm.
Hab. Shaa States.
A supplementary and fuller description is given in the Journ.
Asiat. Soc. Bengal, vol. xxxix, as follows :—
Testa elongate turrita, polita, diapliana, solidiuscula, imperforata;
anfractibus 6, lente convexis, sutura simplici junctis,
striis exilissimis inorementi tectis ; ultimo basi convexiusculo ;
spira breviore ; apertura siibovata, intus lasvi, supra (vel postice)
acute angulata, antice rotundata, sensiin producfa; labio et labro
leviter curvatis, prime paulo incrassato, altero acuto, margine
tenui, extra prope mai'giiiem costa solidiuscula crassa instructo ;
operculo testaceo, ovato, concentrice striate, nucleo subcentrali.
Alt. 8'5, diam. maj. 6-25 mm.
Aperture : ait. 4-75, diam. 3-25 mm.
Hab. Shan States.
150. Bithynia laevis, Morelet.
Bitliynia Icevis, Morelet, Ser. Conclj. iv, 1876, p. 313, pi. 13, fig. q
(as Bithinia kevis) ; Nevill, Hand List, pt. 2, p. 38.
Original description : — Testa superficialiter arcuato-rimata,
conico-oblonga, corneo-rubella vel lutescens, lineolis spadiceis,
distantibus, longitudinaliter notata, nitida, lievis, apice trunca-
•tiila; anfr. 5| convexiuseuli, sutura simplici juncti, ultimus
ventriculosus, circa rimam compressus: apertura ovalis, basi
angulata, intus albido-tcerulea, marginibus crassioribus, obtusiusculis,
fusco anguste linibatis, oolumellari strictim dilatato.
Operculum testaceum, pagina interna homogenea, alba, externa
concaviuscula, epidermide i'ulva, concentrice striata iuduta, nucleo
subcentrali.
Alt. 10, diam. 5 mm.
Aperture: alt. 4-5 mm.
Hab. Siam, Cochin China {Morelet); Damotha, Moulmein
(^fStoliczJca (^' Sichlhofen).