EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 149 



1 (Heller); Nzoia River, Guas Ngishu Plateau, 8, including 4 in 

 alcohol, (Heller). 



The range of this dark form meets that of typical tropicalis on the 

 lower levels of Mount Kenia. A specimen from 7,000 feet on the west 

 side of the mountain is clearly referable to eVjonis, while skins from 

 7,500 feet are placed with tropicalis. Specimens from the summit 

 of the Aberdares are slightly less richly colored than are skins from 

 lower down, but otherwise the scries is remarkably uniform in its 

 deep coloration, and skins from the Kakumega and Kaimosi regions 

 are not distinguishable in color from skins collected at the eastern 

 base of the Aberdares. Kaimosi specimens average slightly smaller 

 than specimens from other parts of the range of the form. 



A female collected at Kaimosi, January 27, contained one embryo; 

 one collected at Changongorra, October 10, two embryos; and one 

 from the same locality at the same time, one large embryo. 



OTOMYS ANGONIENSIS ELASSODON Osgood. 



1892. Oiomys irroratus True, Proc. U. S. Nat. Mus., vol. 15, •p. 464. (Not of 



Brants.) 

 1910. Otomys angoniensis elassodon Osgood, Field Mus. Nat. Hist., Zool. eer., 



vol. 10, No. 2, p. 10. February. (Naivasha, British East Africa; type 



In Field Mus. Nat. Hist., Chicago.) 



Specimens. — Twenty-two, from the following localities: 



British East Africa: Lake Naivasha, 1 (Loring); Mayo River, 

 Laikipia, 15 miles north of Nyeri, 3, including 2 in alcohol (Heller); 

 Nairobi, 1 in alcohol (Mearns); Naivasha Station, 10, including 2 

 in alcohol (Loring) ; Northern Guaso Nyiro River, 1 in alcohol (Cun- 

 inghame); Nyeri, 2 (Loring). 



German East Africa: Mount Kilimanjaro, 4 (Abbott). 



Kilimanjaro specimens seem inseparable from specimens collected 

 at Naivasha. The alcoholic specimens from Nairobi and from the 

 Northern Guaso Nyiro River are both young and not detcrmijiablo 

 with certainty, but appear to belong to this form, which has been 

 recorded from these localities. 



OTOMYS NYIK^ CANESCENS Osgood. 



1910. Otomys nyilcse canescens Osgood, Field Mus. Nat. Hist., Zool. ser., vol. 10, 

 No. 2, p. 10. February. (Kijabe, British East Africa; type in Field 

 Mus. Nat. Hist., Chicago.) 



Specimens. — Sixteen, from the following localities: 



British East Africa: Engare Narok River, 8 (Loring, Heller) 



Engare Ndare River, 2 (Heller); Njoro O Nyiro River, 1( Heller) 



Southern Guaso Nyiro River, 2, including 1 in alcohol (Loring) 



LQukenia Hills, 3, including 1 in alcohol (Loring). 



Heller records three embryos in a female collected at the Engare 



Ndare River, June 29. 



