1881.] Mollusca of the Indo -Malay an Fauna. 147 



Openly and deeply umbilicate, conically somewhat depressedly turbi- 

 nate, solid ; under the lens, the lower whorls are most minutely decussately 

 sculptured, the apical 2$ whorls on the other hand possessing charac- 

 teristic, well marked, distant, longitudinal striation only, these stria? 

 being incised and very obliquely flexuous ; above the periphery a broad, 

 white zone, above and below which there are crowded chestnut-brown 

 bands, almost or altogether confluent, umbilical area white ; spire moderately 

 raised, with the apex exserted in a " mammillate" manner, suture distinct ; 

 whorls 4-g-, convex, the last one with a raised and somewhat rounded 

 keel at the periphery, which becomes obsolete near the peristome ; aperture 

 almost round, oblique, of a bluish-white colour, peristome callously ex- 

 panded, boldly and evenly rounded, columellar margin also evenly rounded, 

 margins of a very characteristic, brilliant orange-red colour, joined by a 

 well developed callosity of the same shade. 



Alt. 40^, diam. 58 mil. 



Type, Indian Museum ; also in coll. Morelet, von Martens and Dohrn. 



Hab.— Naga Hills ; coll. S. E. Peal. 



This fine form which I have previously described and named in the 

 Journal, I still consider may be better classed as a variety, though a very 

 distinct one, of the smaller, more depressed and white lipped G. sublaevi- 

 gatus of Blanford. Nevertheless I have thought it well to give it here 

 a regular specific name, with a detailed description, as a matter of conve- 

 nience for such conchologists as may deem it worthy of specific rank. 



Cyclophokus (Theobaldius) orites, n. sp. PL VI, Fig. 4. 



Broadly and openly umbilicate, solid, depressed, subdiscoidal, covered 

 with a rather thick, smooth, bright yellow, or horn-coloured, epidermis, 

 throughout under the lens very minutely, closely, obliquely striated ; spire 

 perfectly flat, suture excavate ; whorls 4, the last one perfectly round, 

 increasing unusually rapidly in size ; aperture circular, peristome double, 

 the outer margin above near the body whorl, being slightly subangulately 

 produced, showing a distinct transition to the " wing-like" process of 

 Pterocyclus, columellar margin oblique, the duplication of the peristome 

 becoming obsolete. 



Operculum thin, horny, slightly immersed, flat, composed of five or 

 six acutely defined volutions. 



Alt. 5^, diam. 14^ mil. 



Type, Indian Museum ; from Sikkim, Chola Range, at 11,000 ft. 



This interesting species, No. 73, page 276, of my Hand-list, is very 

 distinct from, its allies of South India and Ceylon. 



