ManuiHtls from British East Africa. 223 



tropicalisj Thos., Lophuromi/.t aquilmt^ True, Arvicanthis sp., 

 Le(](j(ida miniitoideH^ Sin., Mas IHndei, Tlios., and Deti- 

 droiinis iusir/itis^ Tlios. Tlie two last-named are rare species, 

 and those additional oxanij)le.s are most welcome. 



'J'lie prize of the collection is the remarkable little mole- 

 like shrew trap|)ed on the Aberdaie Mountains at 9500', to 

 which I propose to apply the following name: — 



SUHDISOREX, gen. nov. {Soricidce). 



IMost nearly allied to Mi/osore.v, but with no external ear- 

 conches, with the fore claws enormously enlarged, with only 

 throe upper unicuspids, the minute penultimate premolar 

 absent, and with the minute lower supplementary tooth more 

 normal in shape and position. 



Type S. Norce. 



This genus is clearly related to Myosorex, but is more 

 fossorial in character, as evidenced by the aborted ear-conches, 

 long fore claws, and short tail, all of which tend t) make it 

 look more like a mole than a shrew. The comparatively 

 normal position of the extra lower unicuspid shows an even 

 more primitive condition than in Myosorex, which is the only 

 other genus of Soricidic that has retained this tooth. 



Surdisorex Norce, sp. n. 



Size rather larger than in any known species of Myosorex. 

 Fur close and mole-like, rather coarser than in average 

 Myosorex; hairs of back about 6 mm. in length. General 

 colour above dark bistre with a greenish iridescence; indi- 

 vidual hairs slaty grey for five-sixths their length, their ends 

 pale brown with darker tips. Under surface similar but 

 rather paler, without line of demarcation. Ear-conches 

 absent. Upper sides of hands and feet dark brown ; fore claws 

 very long and powerful, those of the second, third, and fourth 

 digits subequal, about 5*5 mm. in length (measured from the 

 base above) ; poUex with a pointed claw over 2 mm. long ; 

 median hind claws about 2-5-2*8 mm. in length. Tail very 

 short, not twice the length of the hind foot, closely hairy, 

 without longer bristles, dark brown above and below. 



Skull longer than in any known species of Myosorex, but 

 more slender, the palatal area actually narrower than in the 

 smaller M. Sclateri ta/pinus, though decidedly longer. Teeth 

 much as in Myosorex, but the second upper unicuspid is pro- 

 portionally larger, about one third the size of the first in cross 

 section, and the third is more elongated and nearly touches the 

 large »m*, leaving no space for a fourth unicuspid. Below 



16* 



