
1865.] Contributions to Indian Malacology. 83 
I also met with a shell apparently belonging to this species, but 
not full grown, at Pyema Khyoung, south of Bassein. 
An immature specimen of probably a 4th species of Lagocheilus, 
with very fine and rather close equidistant spiral sculpture, was found 
by me in the neighbourhood of Ava. 

Gxxus PTEROCYCLOS. 
25. Pr. Feppent, n. sp. 
Shell widely umbilicated, convexly depressed, smooth, finely striated 
rather thin, elegantly marked with alternating transverse zigzag stripes 
of white and chesnut, and with a moderately broad submedian band of 
darker colour. Spire nearly flat; apex but very slightly protruded ; 
suture deep. Whorls 44, convex ; the last rounded, descending towards 
the mouth. Aperture circular, slightly oblique ; peristome double; the 
two portions separated by a shallow groove, the inner cut away into a 
moderate sinus above, and the outer turned up into a small vertical 
wing, free from the penultimate whorl. Operculum concave within, 
the centre flat ; flatly concave without, with lamellar free edges to the 
whorls, thickest at the circumference. 
Millem, inch. 
Major diameter,................04 11 0.44 
MEMOR GUL,” 52.-.:capdcnincoodenere 9 0.36 
POI Nee. . walistasssahtore auadecontd 5 0.2 
Habitat—-Thayet Myo, Pegu—rare. 
A smaller and more convex shell than Pt. cetra, Bens. from 
Molmein. Itis one of the most beautifully marked species of the 
genus; it resembles Pt. pullatus, Bens., in form, and in the peculiar 
characters of the operculum, and equals the handsomest specimens of 
Pt. rupestris, Bens., in its colouring. 
Named after the discoverer, Mr. Fedden, of the Geological Survey. 

Genus ALYCANUS. 
26. <A. POoLITUS, n. sp. 
Shell moderately umbilicated, turbinately depressed, smooth, polish- 
ed, shining, amber-coloured. Spire depressly conoidal ; suture deep ; 
apex obtuse, rather redder than the remainder of the shell. Whorls 
33, convex; the last round, scarcely descending towards the mouth, 
very little swollen at the side, and ornamented on the inflated portion 
