igiS.] H. H. Godwin- Austen : Molkisca, IX. 6ti 



the Burrail Range (text-fig. 5, B, C). The jaw (text-fig. 6, C) 

 is well arched and made up of some 12 broadish plates. 



Landouria aborensis, n. sp. 

 (Text-fig. 2 C, D). 



Localitv. — Kobo. Abor Hills {Captain G. F. T. Oakes, R. E. 

 and 5918, 5. W. Kemp). 



Shell narrowly and perspectively umbilicated, globosely conoid, 

 bluntly keeled ; sculpture close irregular striae of growth; colour 

 umber brown in fresh shells ; spire depressedly conoid, apex 

 rounded; suture linear. Whorls 5, flatly convex, aperture roundly 

 lunate, subvertical. 



Size: major diameter 8*4, alt. axis 3"8 mm. 



The shells differ much in height of spire, one specimen out of 

 five sent me is much higher than the type and measures 8X48 mm. 

 The two specimens in spirit collected by Mr. S. W. Kemp at Kobo 

 are small onh' 8X4, one of these has been dissected, and is des- 

 cribed below, the other shell is figured. 



The animal is white with some transverse bars behind the 

 mantle-edge. Male organ as in L. damsangensis (text-fig. 4, 

 A, B, C), the rest of the genitalia was not in a state to see much 

 and I did not like to destroy the shell of the only other specimen. 



The radula was obtained, the formula being 12.9.1.9.12 or 

 21. 1. 21. The teeth are similar in shape to those of L. hengdanensis 

 from the Burrail Range (text-fig. 5, B, C). 



Mikiria^ gen. nov. 



Type: M. diyungensis, G.-A., n. sp. 



Named from the Mikir tribe, inhabiting the hills of the Now- 

 gong District, Assam. 



The penis is very long from the generative aperture to the 

 retractor muscle. Epiphallus short, no flagellum, vas deferens 

 long, spermatheca bulbous with a retractor muscle. 



Shell similar to but larger than in Landouyia, about 15 mm. 

 in major diameter. 



Mikiria diyungensis, n. sp. 

 (Text-fig. 7.) 



Locality. — Diyung Valle5^ Singpho Hills (A/. T. Ogle). 



Shell perspectively umbilicated to the apex, conoid, base flat 

 keeled on the periphery, thin, covered with an epidermis; sculp- 

 ture irregular rather close transverse folds of growth ; colour pale 

 ochraceous ; spn^e moderately high, conic, apex blunt; suture 

 moderately impressed. Whorls 6, closely wound, the last only 

 very slightly descending below the keel ; aperture lunate ; peris- 

 tome very slightly thickened and reflected. 



