LÖNNBERG, MAMMALS FROM BRIT. E. AFRICA. 9 



type of Mylomys cuningharnei was an adult male, but ne- 

 vertheless almost all dimensions of the type skull ^ as quoted 

 by Thomas are considerably smaller than those recorded above. 

 It appears therefore probable that the Mylomys of Donya 

 Sabuk constitutes a larger race than that of the Aberdare 

 Mountains, which I venture to design with a subspecific name 

 massaicus. Its colour above is grizzled black and påle buffish. 

 On the posterior part of the back the colour becomes richer, 

 »Mars yellow» (Dauthenay, Rép. de Coul. 316,3) mixed with 

 black. On the sides of the root of the tail, on the tighs and 

 liind legs this colour is quite dominating. A tuft of the same 

 colour is also seen at the base and inside of the ear. The 

 före legs have the same colour as the body. The hands are 

 grizzled blackish and påle buffish, the general appearance 

 being rather dark. The »Mars yellow» extends from the 

 hind legs down on the feet (in the type), but the scanty hairs 

 of the toes are partly paler, partly brovvn making the gene- 

 ral colour rather dark. (The latter arrangement holds good 

 for the whole hind-foot of the other specimen.) The under 

 surface white in the centre, påle buff on the sides. The 

 scanty under fur in the white region very påle grey (a little 

 more plumbeous grey in the other specimen). The hairs of 

 the upper side of the tail are blackish brown, those below påle 

 buffish with a sharp line of demarkation. There are about 

 11 (10 — 12) rings of scales to the centimetre. 



The colour is thus on the w^hole similar to that of the 

 Aberdare race, but to judge from Thomas' description, there 

 are also some discrepancies. The Mylomys from Donya Sa- 

 buk appears to have larger ears, collectors measurement 22 

 mm., in dry state about 20, against 17 in the Aberdare race. 

 The collectors measurements of head and body of the two 

 specimens are resp. 161 and 141 mm., of tail resp. 145 and 

 138 mm. Especially the latter measurements exceed the 

 corresponding one of the Aberdare race viz. 102 mm. and 

 that is also the case in a dry state. 



Dasymys sayaimus Heller. 



1 adult $ coUected at Donya Sabuk 11 Febr. 1914. 



It is possible that this specimen represents a somewhat 



^ Ann. Mag. Xat. Hist., ser. 7, Vol. XVIII, 1906, p. 226. 



