t^^l

116 MSIlfjKIII.B.
obliquatis; apertura semi-lunari, obliqua, alba; colore externo
fusco, subcorneo.
Shell greenish brown, finely ridged ; spire rather flattened ;
whorls 3, last large; aperture angularly raised, then depressed,
sloped, expanded below, rather produced; lower disc broadly
concave.
Alt. 10-25, diam. maj. 20-5 mm. (fig. 10 in Oonch Ind.).
Hah. India; Oeylon. (Generally diffused.)
The P. coromcindelicus, Kiister, described and figured by Sowerby
in Eeeve's ' Conchologia Iconica,'vol. xx, pi. 4, sp. 34, seems to
be a synonym.
Var. eburneus, Gray, Sowerby, in Eeeve, Conch. Icon, xx, pi. 5,
sp. 38 ; Clessin, in Conch .-Cab." 1885, p. 226.
Shell high, tumid, undulating, smooth, white, banded with
chestnut in the middle of the whorls ; apex small; whorls 3,
rather flattened above then sloped, inflated below; last large,
high, rapidly increased ; lower disc convex, apical whorl hidden ;
aperture large, flexuously depressed above, inflated below,
produced. {Sowerby in lieeve.)
Diam. maj. 17, diam. min. 13'5 mm. (fig. 38 6 in Conch. Icon.).
Hah. Ceylon.
Var. brunneus, Gray, Adams, Genera, ii, 1858, p. 261; Sowerby,
in Eeeve, Conch. Icon, xx, pi. 5, sp. 40 ; Clessin, in Conch.-
Cab. 1885, p. 226.
Shell subglobose, high, smooth, ferruginous, spire small; whorls
contracted above, raised, a little angular above the suture, then
rounded, inflated in the middle ; lower disc narrowly umbilicated ;
aperture semilunar, produced and expanded below. {Soiverhy in
Reeve.)
Alt. 8-25, diam. maj. 12-5 mm. (fig. 40 i in Conch. Icon.).
Hah. Bombay.
The following are the dimensions taken from Sowerby's figures
in Eeeve: alt. (excluding labrum) 6-5, diam. maj. 11-25, diam.
rain. 9; aperture : alt. (including labrum) 8, diam. 6 mm.
There can be little doubt that it is a small variety of PI. exustils.
Var. zonatus, Dunker, in Conch.-Cab. 1884, p. 117, pi. 17,
fig.l.
Alt. 6|, diam. 16 mm.
Hah. Ceylon.
Appears to be irregularly transversely banded with purplish red.
228. Planorbis zebrinus, Bunker.
Planorhis zebrinus, Dunker, ( Conch.-Cnh. 1850, p. 67, pi. 6,
flg-s. flo-s. 11-13.
Original description:—PI. testa solida, stramiuea strigisque rufis