GUDE : SPECIES OF t>LECtOPYLtS. 7 



dont nous ne nous dissimulons nullement les imperfections, mais qui 

 aura, nous I'esperons du moins, I'avantage de faire connaitre aux 

 naturalistes, que ces sortes d'etudes interessent, I'etat actual de la 

 science . . . . et de leur scrvir de point de depart pour de nouvelles 

 recherclies . . . . ou il doit y avoir encore bien de decouvertes a 

 faire pour les explorateurs." 



SPECIES OF PLECTOPYLIS RECENTLY DESCRIBED 

 IN "SCIENCE GOSSIP."^ 



By G. K. GUDE, F.Z.S., 



London. 



Plectopylis muspratti, Gude. 



Shell sinistral, discoid, widely and deeply umbilicated, pale corneous, 

 streaked transversely with dull brown ; finely striated and decussated 

 with spiral lines, which are very distinct on the upper surface, but 

 less so below. Suture impressed, si)ire a little conical. Whorls 

 six and a half, scarcely convex, slowly increasing, the last widening 

 towards the aperture, slightly angular above, descending suddenly 

 in front, and a little constricted behind the peristome. Aperture 

 roundly lunate, peristome white, thickened and reflexed, margins 

 converging. Parietal callus with a strongly raised flexuous ridge, 

 which is separated from both margins by a little notch. Umbilicus 

 wide and deep. Parietal wall with a short entering flexuous fold 

 united to the ridge at the aperture, becoming attenuated inwardly, 

 and at one-third of the circumference from the aperture, with a 

 strong, crescent-shaped vertical plate, which is suddenly deflected 

 posteriorly at the lower extremity ; below this, on the anterior side, 

 occurs a very short, horizontal fold. Palatal folds six, horizontal, 

 short ; the first free, with a small denticle posteriorly ; the second, 

 third, fourth, and fifth connected with each other by a vertical 

 ridge, which deflects below the fifth fold posteriorly and terminates 

 in a small, oblique denticle; the sixth again free. — Major diameter, 

 13 millimetres; minor diameter, 11 millimetres; axis, 6 millimetres. 

 Habitat, Naga Hills, Assam. — Type in Colonel Beddomc's col- 

 lection. 



I Reprinted from "Science Gossip," N.S. vol. iv, 1897-1898. By kind permission of the Editor. 



