386 MR. E. A. SMITH ON THE [Apr. 18, 
PHysa MADAGASCARIENSIS, Angas. (Plate XXII. figs. 18, 19.) 
Physa madagascariensis, Angas, Proc. Zool. Soc. 1877, p. 528, 
pl. 54. figs. 2a, 26. 
Hab. Ekongo, S.E. Madagascar (Waters) ; Betsileo (Cowan). 
The type figured in the ‘ Proceedings’ is larger than any of the 
specimens from Betsileo, and rather broader and more globose than 
most of them ; but all agree in the peculiar conspicuous longitudinal 
subliration or plication which adorns the surface. The suture is 
deep and channelled, and filled up by the upper terminations of the 
plicee, which form fine erect lamelle. P. lirata of Tristram has a 
depressed spire and even stronger lire than the present species, in 
which the spire is at times considerably higher than in the shell 
depicted by Angas. 
PuysA LAMELLATA, sp. nov. (Plate XXII. figs. 14, 15.) 
Shell very fragile, rimate, ovate, not very glossy, olivaceous horn- 
colour, longitudinally coarsely lamellato-lirate. Whorls 3-4, convex, 
separated by a deeply channelled suture, the last descending, not 
square-shouldered above. Aperture occupying a little more than three 
fourths of the entire length of the shell. Columella but little con- 
torted, reflexed, joined to the lip above by a thin corneous callosity, 
more or less striated lengthwise. 
Length 12 millim., diam. 9 ; aperture 9 long, 5 wide. 
Hab. Twenty miles from Antananarivo (Johnson). 
This may be but a variety of P. lirata of Tristram, of which there 
is a single specimen in the British Museum cbtained from the col- 
lection of the late Henry Adams. It is chiefly distinguished by the 
difference in its form, the greater coarseness of the lire, which have 
a thin lamellar epidermis attached tothem. The last whorl descends 
near the aperture, and is not so squarely shouldered as P. lirata. 
PHYSA OBTUSISPIRA, sp. nov. (Plate XXII. figs. 16, 17.) 
Shell small, transparent, light horn-colour, narrowly rimate, some- 
what glossy, indistinctly spirally striated, longitudinally plicately 
ridged, very regularly and strongly upon the spire and upper part of 
the body-whorl near the suture, the liree on the lower part becoming 
subevanescent. Volutions 33-4, very convex, rapidly increasing, 
separated by a deeply channelled suture. Spire very short, only a 
little raised above the last whorl. The latter descends in front, is 
large, and rounded at the shoulder above. Aperture inversely sub- ~ 
auriform, and occupying about four fifths of the entire length of the 
shell. Columella very slightly twisted, narrowly reflexed over the 
umbilical fissure, connected with the lip above by a thin callus upon 
the whorl, which sometimes exhibits a few white lines uponit, disposed 
lengthwise. 
Length 10 millim., greatest diam. 8 ; aperture 8 long, 43 wide. 
Hab. About 20 miles from Antananarivo (Johnson) ; Betsileo 
( Cowan). 
This, like all the known species of Physa from Madagascar, is 
