1882. ] MOLLUSCAN FAUNA OF MADAGASCAR. 379 
still finer. CO. sarcodes, Pfr., is still higher in the spire, with higher 
volutions, and more strongly lirate, especially on the lower surface of 
the last whorl. 
VITRINA MADAGASCARIENSIS, sp. nov. (Plate XXI. figs. 6, 7.) 
Shell ventricose, depressed, very thin, diaphanous; pale greenish 
yellow, with a brown line at the suture, and with the upper part of 
the outer lip of the same colour, brilliantly glossy. Spire small, a 
little elevated and obtuse at the apex. Whorls 33, convex, deep, and 
margined above at the suture ; the first 15 microscopically decussated 
in a beautiful manner by minute spiral striee and very fine lines of 
growth, the last two lacking the spiral strie. Body-whorl large, with 
distinct, here and there subplicate, lines of growth, on the lower 
surface exhibiting indications of interrupted concentric striz. Aper- 
ture subhorizontal, large. Columella arcuate, thin, wrinkled, as is 
also the base of the peristome. 
Greatest diam. 154 millim., smaller 12, height 9. 
Hab. Betsileo (Cowan). 
This I believe is the only species of Vitrina at present known 
from Madagascar ; and it bears some resemblance to certain forms of 
the genus from South Africa, 
Heurx (Nanina?) Batstonr, Angas. 
H. balstoni, Angas, Proc. Zool. Soc. 1877, p. 528, pl. 54. f. 5. 
Hab. Interior of Madagascar (Angas); forest 36 miles east of 
Antananarivo (Johnson). 
The specimen presented to the British Museum by Mr. Johnson 
is narrowly perforated, in which respect alone it differs from the 
description of this species given by Angas. Two other shells in 
the Museum are also narrowly perforate ; and even the above-quoted 
figure looks as if the example delineated were likewise umbilicate ; 
so that it is possible the species was described as “imperforate ”’ 
accidentally. 
Hexix (Nanina?) CLEAMEsI, sp. nov. (Plate XXI. figs. 8, 9.) 
Shell very thin, semitransparent, vinous horn-colour, narrowly 
perforate, suborbiculately conical, keeled at the periphery, marked 
with curved lines of growth crossed and rendered minutely granular 
on the spire by fine concentric striz, more finely concentrically 
striated on the under surface, more glossy and not granulated. 
Spire with slightly convex outlines, shortly conical, ending in an 
obtuse tip, Whorls 6, a little convex, regularly increasing, a little 
depressed near the lower submarginal suture, or, in other words, just 
above their periphery. Last volution keeled above the middle, the 
carina being less marked near the outer lip. Base convex. Aper- 
ture somewhat oblique, lunate. Outer lip obliquely arcuate above 
the feeble carination, straightish or even a little sinuated below it in 
a very slanting or receding direction. Columella narrowly expanded 
and reflexed over the perforation, forming below, with the basal edge, 
a regular wide curve. 
