1896.] NATURAL SCIENCES OF PHILADELPHIA. 521 



Smithsonian Institution, the paler sandy cast of the Somali speci- 

 mens is very noticeable, and the dorsal spot is almost white instead 

 of ochraceus. The difference in size of skulls, between the type and 

 the subspecies, although the Shebeli specimen is the older, is very 

 marked, but no specific distinctions are noticeable. 



*22. Elephas africanus BIbch. African Elephant. 



Ten small, and one large pair of tusks adorn the University of 

 Pennsylvania collection. 



23. Sciurus sp. ? 



An adult male specimen (No. 3,810) from Marsabit, taken Sep- 

 tember 11, 1895, differs in many particulars from any African squir- 

 rel which I can find described. It may be characterized as follows : 

 Colors — Upper head, back and the slender tail, dull black, grizzled 

 with tawny brown ; half the hairs of back wholly black, the remain- 

 der black-based with light brown ring and black tip. Brown-ringed 

 hairs more numerous on sides, giving a lighter shade to those parts. 

 Upper and lower sides of tail colored alike, blacker toward distal 

 end ; hairs at base black with one to three light brown rings, termi- 

 nal hairs longer and blacker with now and then a subterminal brown 

 ring. Upper feet and scrotum rusty haired. Whisker patch, 

 cheeks, line around eyes, chin, throat, breast, inside of legs, and a 

 narrow abdominal line dirty tawny white or fawn. Ears sub tri- 

 angular, colored like back. Fur rather short and harsh. Whis- 

 kers sparse, weak, black. Color of sides encroaching on abdomen. 



Measurements (from skin). — Total length 320 mm. ; tail verte- 

 brae 160; i^encil 43; hind foot 40. Skull— Total length 40 ram.; 

 greatest breadth 24; length of nasals 11 ; length of mandible 23.5. 



This squirrel apparently comes nearest S. poensis A. Smith, but it 

 lacks any trace of greenish color, is smaller and the tail and body 

 are of equal lengths. Like poensis the five upper molars on each 

 side are well developed and permanent. 



It appears too small and dark for S. cepapi A. Smith. With any 

 of the recently described species it seems to have no close affinities- 



24. Sciurus sp. ? 



A young male squirrel in alcohol, from the Ganana River (Feb- 

 ruary 18, 1895), is colored somewhat like S. annulatus Desm. and 

 S. cepapi Smith. Like cepapi it has five upper molars, but unlike 

 either of the above, its tail vertebrae are more than IV times the 

 length of the body without the head. The specimen is about two 



