t^^l

104 LIMN^II)^.
Order PULMONATA.
Suborder HYGROPHILA.
Family LIMN^ID.E.
Subfamily ANCYLIN^.
Sbell patelliform, without spivp.
Distribution. Temperate and Tropical Eegions of the World.
Genus AECYLUS.
Anciflus. Geoffror, Traits de Coq. de Pai'ig, 1767; Clessin, Oonch.-
Ciib., 1882, p. 11, etc.
TTPE, A. Jluviatilis, LinniBus, from Europe generally, Algeria
and Madeira.
llange. Europe, Asia.
Shell small, patelliform, either dextral or sinistral, thin, conoidal;
aperlure either ovate or rounded ; peristome ncute, simple.
Animal having the lateral teelli of the tongue narrow, sharp
pointed, and the cardinal [median] tooth, s'mall, rounded.
206. Ancylus baconi, Bourguignat.
Anctflus haeoni, Bourguignat, Cat. Ancvl. in Joiirn. de Conch, ir,
1853, p. 181; Boiu-a. Uesei-. Ancvl.'Cuming in P. Z, S. 1853,
p. 89, pi. 25, fio?."18-25; H. &" A. Adams, Gen. Rec. xMoll.
ii, 1855, p. 266; Bourg. Spicil. Make. 1862, p. 205; Clessin in
Couch.-Cab. 1882, p. 61, pi. 7, fig. 7.
Original description :—Testa antice recta vel paululum convesa,
postice recta vel paululum concava ; apice poslico, obiusi^simo,
paululum dextrorsus dejecto ; (k'pressione apica'i vix coi.spicua,
in extreniitate vertieis sita. Te.-la par\a, fragili, diaphima,
Isevissima, vel concentrice striatula; epidermide albido-virescente ;
apertura ovata.
Alt. 1, diara. maj. 3, diam. min. 2 mm.
Bab. Bengal.
207. Ancylus ceylalnicus, Benson.
Anet/lus ceylanicus, Benson, A. M. N. H, ser. 3, xiii, 1864, p. 139 ;
H. & T., C. I. pi. 81, figs. 2, 3.
Original description :—Testa suboblonge conoidea, antice convexa,
postice concava, extus tenuissime radiato-costulata, costis
subremotis elevatioribus munita, striis confertis concentricis decussata,
viridesoenti-cornea, margine lato, lulescenti-cornea, apice