MICRAULAX. — DITROPIS. 



23 



Original descniition:—'' Testa late et profunda umbilicata, et 

 sulco hand profuudo et valde iueouspicuo iatiis iiistructa, linea 

 parum elevata externe notato. Anfractibus 4 -U coiivexis, ultimo 

 subinflato, celeriter cresceute, et ad aperturam uou descendente. 

 Epidermide scabra, juxta aperturam corrugata. Apertura parum 

 obliqua, subcirculari, breviter adnata. Operculo? 



" Lat. major U-L'O, lat. minor 1200, alt. 0-20, apertursc lat. 

 6-OU mm." (Theobald.) 



Hab. India: Travancore. 



Pig. 8. — Micraulax scabra. 



The accompanying figure is from the type in the British 

 Museum. It measures: Diam. maj. 15, min. IS'o, alt. (mcl. 

 apert.) 8'5 mm. 



Genus DITROPIS, Blanford. 



mropis, Blanford, J. A. S. B. xxxviii part 2 186^), p 12G (as sub- 

 oenus of Ojchpkorus); llanley .S: Theobald Conch Ind. 18/5, 

 p. xiv (genus); Theobald, Cat. Shells Knt. India, 18/6, p 37 ; 

 Kobelt & Mollendorff, Nachr. Deuts. Malak. Ges. xxix, 1897, 

 p 86; id., Cat. Pneum. 1899, p. 14; Kobelt, Das Tierreich, 

 Lief, ie, 1902, p. 72. 



Type, Gyclophorus planorUs, Bkanford. 



Range. India, Malaysia, Pbilippiue Islands; New Guinea; 

 ritzroy Island, Australia; East Africa. 



"Testa translueens, subvitrea, epidermide ohvacea nitida 

 instructa, carinis duabus, vel pluribus, una ad peripheriam, altera 

 subtus ab ilia interspalio disci'eta circumdala. Operculum cor- 

 ueum, arctispirum, duplex, lamina interna membranacea, externa 

 crassi'uscula, margiuibus anfractuum liberis, ambabus sulco mar- 

 '-■inali disjunctis. Animal igiiotum. 



"Shell translucent, almost vitreous, covered with a smooth 

 olivaceous epidermis, with two or more spiral ribs, one of which 

 is always at the periphery of the last \\ liorl, and a second below, 

 separated by an interval from the other. Operculum horny, 

 closelv wound, composed of two laminae, separated by a marginal 

 oroove, the inner membranaceous, the outer rather thick, 

 and with the edges of the whorls free. Animal unknown. 



(Blanford.) • j i -oi f i 



The lingual ribbon of one species was examined by Blautonl. 



