1861.] 
351 
Contributions to Indian Malacology. 
ally at tlie village of Cully goody where it was found abundantly in 
piles of stones (limestone), together with Helix Semifusca T)esh. 
and another species, C. involvulus , Mull., was found by Mr. King at 
Verdachellum and elsewhere. 
A solitary specimen of Pterocyclos bilabiatus had been obtained by 
us from the Kolamullies before Mr. King’s specimens were collected. 
It is of the same variety as that originally described, and has a nearly 
flat spire. The variety from the foot of the Nilgiris, and which 
occurs, by no means rarely, at the foot of the Coonoor Ghat, shews 
several distinctions, the spire being considerably elevated (depressly 
subturbinate) and the wing and undulations of the peristome much 
more largely developed. The epidermis also is thinner. In the 
absence, however, of a series, we are not certain that the species are 
distinct. 
No. 4.- — Jerdonia ? Kolamulliense, n. s. PI. I. fig. 4. 
Testa aperte umbilicata, depresso-turbinata, albido-eornea, trans- 
verse striata, rubeola ; spira conoidea, apice acutiuscuta, sutura im- 
pressa. Anfr. 4 convex!, ultimus rotundatus, costis 5 filiformibus 
circumdatus, aliis 7 crebris, striis verticalibus deeussatis, in umbilico 
ornatus, quarum ima ad marginem basalem angulatam umbilici cari- 
nam prasstat. Apertura circularis, obliqua ; perist. rectum, simplex, 
continuum, superne ed at latus dextrum valde antice porrectum, 
margine columellari recedente. Umbilicum perspectivum, conieum. 
Op ere. ? 
Diam. maj. 2f, min. 2^, Axis 2, Ap. diam. 1 mm. 
vel „ 0.10 „ 0.09 „ 0.08 „ 0.04 unc. 
Habitat in montibus Kolamullies ; teste IV. King. 
Only 4 specimens of this very singular species were found by Mr. 
King, and of these but one was in fresh condition, while three were 
imperfect. In the absence of the operculum, it is difficult to decide 
upon its generic affinities : in many of its characters however and especi- 
ally in the spiral costulation, the horny texture, the shape of the mouth 
generally, and that of the umbilicus with its basal keel, it so closely 
resembles the more turrited C. trochlea, Bens, from the Nilgiris, that 
we have little hesitation in referring it to the same group, which wc 
propose to separate as a subgenus under the name of Jerdonia.* 
* C. trochlea is classed by Dr. Pfeiffer as a Gyclostomus. As wo have since 
obtained the operculum, which is peculiar but many-wliorled and concentric, 
2 y 2 
