t^^l

AlfCTLUS. 105
subraediano, subelongato, postice attenuato, acutiusculo, ad dextrum
leviter verso ; apertura subrotuudato-ovata, intus albida
Bitente.
Alt. 2'5, diam. maj. 6, diam. min. 4 mm.
Bah. Matelle CMafale) District, Ceylon.
Eesembliiig in some respects the A. fluviaiilis of Europe.
208. Aucylus tenuis, Bourguignat.
Ancyhis tenuis, Bourcuipnat, SpicJl. Malac, 1862, p. 208 ; Clessin,
in Concli.-Cab. 1882, p. 63.
Original description :—Testa p3'gmea, depresso-oblonna, fragili,
laevi, cornea, vel lufeolo-nigresceute ; — antice siuistrorsusque
piiiilulum convexa; postice dextrorsusque recta, vel pauliilum
concava ; — apice maximo, obtusissimo, paululum cani'.liculato,
postico, dextrorsus paululum dejecto ; — depcessione apicali
ininima, rotundata, ad sinistram partem verticis sita; — apertura
oblonga.
Alt. 1-5, diam. maj. 2 mm.
Ilab. Streams in the Nilgiri Hills.
209. Aucylus verruca, Benson.
Ancyliis verruca, Benson, A. M. N. PI. 185o, ser. 2, xv. p. 12;
11. & T., 0. I. pi. 81, figs. 2, 3; Clesiin, in Oonch.-Oab. 1882,
p. 62.
Original description.—Testa vix sinistrorsa, depressa, subelongato-o\ata,
postice vix angustiori-liBvigata, pallide vireuteflavida
vel cinerea, tenui, intus albida, submargaritacea, antice
superne convexiuscula, postice prope uinbouem breviter declivi,
rniibone vix elevato, compiessiusculo, submediano, ad spatium
•| to'se testte posita. ,
Alt. 1, diam. maj. 3'5, diam. min. scarce!}' 2 mm.
Hah. Bhiiiilal; Remaon Lake; marshes near Moradabad;
near Budaon Eohilla; Orissa ; Ceylon, etc., always adhering to
the floating leaves of water plants.
Prom Benson's notes, attached to bis original description, it
would seem that the present species, though generally slnggish
in its habits, is able to swim shell downwards on the surtace of
the water.
Subfamily LIMNiEIN^.
Shell ovate or fusiform with exserted, or more or less contracted,
spire.
Distribution. World-wide.