belonging to the Genus Crocidura. 513 



Group 18 {allex and alpina). 



Size very small. Colour above dark sepia or brownish red, below 

 greyish buff. Fur normal in length. Second and third upper 

 unicuspids about equal in size. 



(102) Crocidura allex, Osg. 



Crocidura allex, Osgood, Field Mus. Nat. Hist. Publication 143 (Zool. 

 Ser.), vol. x. no. 3, p. 20 (1910). 



Almost equal in size to b. cuninghamei, with shorter skull, 

 higher brain-case, and slightly smaller teeth. 



Fur much longer than in bicolor and its allies, more as in 

 the hildegardets group. Colour of dorsal surface dull brown 

 (near " sepia "), very much as in /. amalce ; flanks rather 

 more strongly tinged with buff, the brown tint passing 

 fairly abruptly into the greyish buff of the ventral surface. 

 Backs of hands and feet greyish or greyish buff. Tail 

 slender and finely haired, almost naked in general appear- 

 ance ; dark brown above, rather lighter below. Caudal 

 bristle-hairs normal. 



Skull a trifle shorter than in cuninghamei, with a higher 

 brain-case, more as in bottegi, but larger and with larger 

 teeth ; second and third upper unicuspids about equal in 

 size, but overlapping. 



Dimensions of the type (as given by Osgood) : — 



Head and body 64 mm.; tail 45 ; hind foot 12. 



Skull : condylo-incisive length 17*1 ; greatest breadth 7'7 ; 

 postpalatal length 7*9; greatest maxillary breadth 5*2; 

 length of upper tooth-row 7" 15. 



Hub. Naivasha, British East Africa. 



Type. Adult male. Field Mus. Nat. Hist. no. 16820. 



In the Museum Collection there is a single specimen from 

 near Lake Olbollossat, collected and presented by A. Blayney 

 Percival, Esq., which agrees fairly closely with Osgood's 

 description ; the flesh-dimensions of this individual are 

 given as : — Head and body 55 ram. ; tail 38 ; hind foot 11 ; 

 ear 7. 



From its near neighbour, bicolor cuninghamei, this 

 Naivasha species is distinguished externally by its much 

 longer fur and browner colour; the skulls are very distinct, 

 that of allex being very much higher and with a more 

 rounded brain-case. The following species, alpina, from 



Ann. tb Mag. N. Hist. Ser. 8. Vol. xvi. 36 



