On new Shells from British East Africa. 463 



coming vertical terminally. Last molar disproportionately 

 smaller than the other cheek-teeth. 



Dimensions of tlie type (measured in flesh) : — 



Head and body 143 mm.; tail 13; hind foot 28. 



^kiiU : condylo-basal length 37*6 ; condylo-incisive length 

 39-6; zygomatic breadth 28"7; nasals 16x4*7; interorbital 

 breadth 10'8 ; palatilar length 22*6; upper molar series 

 (crowns) 6 •8. 



Uab. and Tupe as above. 



This interesting rodent-mole, which I have named In 

 honour of the donor of the collection, is widely different from 

 any described species, as is, indeed, to be expected from its 

 locality. Perhaps its nearest ally is the G. Jecliei of Mon- 

 buttu, but that is considerably larger. Tlie only other West- 

 African species, G. zecM, of Togoland, is a very pale animal, 

 while G.foxi is one of the darkest species of the genus. 



LIV. — Descriptions of Thirty-six naw Species of Land and 

 Freshicater Shells from British East Africa, cliiefly fr.m 

 Mount Kenia and the neighhonring District. By H. B. 

 Preston, F.Z.S. 



[Plates XI. & XII.] 



Ennea consobrina, sp. n. (Fig. 1.) 



Allied to E. uniliroia, Smith *, which also occurred at the 

 same locality, but differing from that species in its larger, 

 more solid, and more cylindrical form, the later whorls in the 

 present species not decreasing in size, its coarsely striate 

 sculpture, broader and more rectangular aperture, and thick 

 rather broadly reflexed hibrum ; moreover it lias one whorl 

 more, the whorls are flatter, and the suture is shallower. 



Alt. 4*25, diam. maj. 2-25 mm. 



Aperture : alt. 1, diam. "75 mm. 



Hah. Mount Kenia, at an altitude of 9000-10,000 feet, 

 Biitish East Africa. 



Ennea iota, sp. n. (Fig. 2.) 



Shell minute, ovately pyramidal, thin, white; whorls 5, 

 regularly increasing, the last ascending in front, sculptured 



* J. Couch. X. p. 315. 



