376 MR. E. A. SMITH ON THE [Apr. 18, 
several of his own interesting discoveries. ‘The remaining portion 
was obtained from the Rev. W. Deans Cowan, and was collected by 
him in a more southern part of the island than that visited by Mr. 
Johnson. It also contains several very interesting forms, notably 
the species of Vitrina previously referred to, and the Bulimus 
nigrilineatus of Reeve, belonging to a section (/thachis) of that im- 
mense group of land-snails which was hitherto unknown in Mada- 
gascar. 
A, GASTROPODA. 
CyCLOsTOMA MACAREZ, Var. 
Hab. Betsileo (Cowan). 
The typical form of this species, described by Petit, was originally 
collected in the south part of Madagascar, near Saint Augustin. The 
more northern variety from Betsileo is rather more coarsely sculp- 
tured, and has a distinct peripherical black zone, and sometimes a 
broader but less distinct one on the upper part of the last whorl. 
CYCLOSTOMA BETSILEOENSE, sp. nov. (Plate XXI. fig. 2.) 
Shell umbilicated, turbinate-globose, thinnish, finely spirally lirate, 
encircled with two more prominent white keels, one at the middle of 
the body-whorl, and the other above, decussated by close lines of 
growth ; cinereous (except the reddish spire), copiously striped longi- 
tudinally with a brownish colour, with a few spiral purple-black 
lines and zones, one just beneath the central white carina, broader 
than the rest, and a rosy stripe outside the labrum. Whorls 53, 
separated by a narrowly channelled suture, which is beautifully 
clathrated by the lines of growth. Two nuclear whorls smooth, con- 
vex, forming an obtuse apex ; the rest convex, but appearing a little 
angular at ora little above the middle, where the upper carina is 
situated. The visible spiral threads are six in number on the ante- 
penultimate whorl, about twelve on the penultimate (including the 
two white keels), and nearly doubie the latter number upon the upper 
half of the body-whorl, the lower part having as many as thirty-two 
to thirty-five, those around the umbilicus being a trifle coarser than 
the rest, the interstices being everywhere decussated by the lines of 
growth. The spiral lineation is constant in three out of five examples, 
is chiefly confined to the last whorl, and is most conspicuous within 
the aperture when the shell is held up to the light. There are two 
lines above the upper white keel, two between it and the lower one, 
and about six beneath the latter, the uppermost being much broader 
than the rest. Aperture subcircular, chestnut within, very dark 
towards the outer lip, showing the external lines and bands, a little 
higher than wide. Peristome acute, white on the columellar margin, 
only narrowly reflexed, flatly and more widely expanded on the right 
or outer margin, pink, except at the upper part towards the suture. 
Greatest diameter 25 millim., height 25. 
Hab. Betsileo (Cowan). 
In some respects C. pu/chellum of Sowerby approaches this species. 
