82 Contributions to Indian Malacology. [No. 2, 
as republished in Otia Conchologica, p. 183, no mention is made of 
the angulation of the periphery, which, however, is referred to by 
Pfeiffer, (Mon. Helic. I. 8). The character is certainly variable: in 
specimens in my own collection there is a considerable difference. 

Orper,—PROSOBRANCHIATA. 
Family Cyclophoride. 
Genus CYCLOPHORUS. 
24. C. (Lagocheilus) LEPoRINes. 
Shell narrowly umbilicated, conically turbinate, thin, dark horny, 
and ornamented throughout with oblique striz and with raised spiral 
lines, closer together at the periphery and within the umbilicus than 
elsewhere. Spire conical ; apex rather acute. Whorls 53, rounded ; 
the last cylindrical, not descending. Aperture oblique, subcircular, 
angulate above ; peristome simple, thickened, subexpanded, incised at 
the upper angle; columellar margin curved backwards. Operculum 
horny, greyish white, multispiral. 
Millem. inch. 
Major diameter, .......+ babes 4 0.16 
Minor, ditto, (2) tc. ce encactble ent 34 0.14 
AA 9: uct bean ago Sie tate. 3 ows 4 0.16 
Habitat—Akoutoung, Pegu. 
This form is allied to Cyclophorus scissimargo, Bens., and C. tomo- 
trema, Bens., forming with them the group for which Mr. Theobald 
has proposed the name of Lagocheilus. There appears good reason for 
associating these shells as a distinct subgenus, which perhaps repre- 
sents, in Burma, the group of Cyclophori comprising C. halophilus and 
its allies in Southern India and Ceylon. The present species is 
smaller and higher in the spire than either of the others. The animal . 
of C. leporinus is short, dark in colour, with small black tentacles, and — 
resembles ordinary Cyclophort in most characters. The only specimen 
obtained living and examined, possessed, however, the peculiarity of a 
groove down the middle of the caudal portion of the foot above. 
The peristome is simple in the only perfect adult specimen which I 
possess, but in a broken barely adult shell, there is a rudimentary 
duplication, The two lips are probably united in the full grown shell. 

