594 Records of the Indian Museum. [Voi^. VIII, 



Oxytes oglei, n. sp, 



(Plate Hi, figs, i, la, i&.) 



Locality. — Upper Assam, near Sadtya {M. T. Ogle). 



Shell lenticular depressed, very openly umbilicated , solid; 

 sculpture close rather coarse ribbing, more distant on base and 

 much smoother; colour dull ochraceous; spire flatly conoid, sides 

 flatly convex, apex rounded; suture linear; whorls 5, regularly 

 increasing, flat; aperture subquadrately lunate, obUque ; peristome 

 well thickened below together with the columellar margin which 

 is suboblique. 



Size: major diameter 41*0, minor 34*0, alt, axis I2'75 mm. 



This species was found and sent to me by Mr. M. Ogle when 

 he was surveying in the neighbourhood of vSadiya and towards 

 Brahmakund. Compared with typical Oxytes oxytes from the 

 S.W. Khasi Hills it can be distinguished at once by the more open 

 and excavated umbilicus. When compared with 0. oxytes of the 

 Dafla Hills this difference in the umbilical region is still more 

 marked. 



It may be distinguished from 0. cycloplax, Bs., from Darjiling, 

 with which I have compared it with specimens in the Blanford 

 collection, in the open umbilicus and general shape. It is however 

 larger, darker coloured, higher in the spire, more sharply keeled 

 and there is absence of the peripheral band, visible both externally 

 and internally in 0. cycloplax. It is also deeper below the keel, 

 making the aperture larger. 



Oxytes oglei, n. sp., var. 

 (Plate lii, figs. 4, 4a, 4^.) 



This variety was found by Mr. S. Kemp at Kobo on the 

 Brahmaputra. The specimens are rather small, maj. diam. 39*0 

 mm. Finer specimens were sent me by Captain Oakes, from the 

 foot of the hills near Bapu, H.S. The largest measures major 

 diameter 43 5, minor 37"5, alt. axis 148 mm. The variation lies 

 in the sculpture which is finely decussate both above and below, 

 fine solid shells. 



Young shells of this species are very difficult to determine for 

 they have such a different shape to those fully grown. The 

 following is a description of one collected by Captain Oakes with 

 three others, and put up together. 



Locality.—AhoT Hills (Capt. G. F. T. Oakes, R.E.). 



Shell openly umbilicated, very depressedly conoid, sharply 

 keeled ; sculpture strongly decussate ; colour dark umber brown ; 

 spire low, flatly conoid, apex obtuse; suture somewhat shallow ; 

 whorls 5 , flat above ; aperture semiovate, oblique , peristome thin ; 

 columellar margin oblique. 



Size: major diameter 20*0, minor 17-5, alt. axis 7*0 mm. 



