EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 39 



5 millimeters long; and one, October 2, with tM^o embryos 18 milli- 

 meters in length. 



With the exception of those collected at 10,000 feet, where they were trapped in 

 open grasfjy and brushy parks in the bamboo, most of them were taken in runways of 

 Otomys, and all of those taken at 12,100 were caught in such runways in tall marsh 

 grass.* 



Genus SYLVISOREX Thomas. 



1904. Sylvisorex Thomas, Abstr. Proc. Zool. Soc. London, No. 10, p. 12. Novem- 

 ber 22. {S. morio.) 



Two distinct groups of forest shrews are known from Equatorial 

 East Africa. Species of each group are included m the collections. 

 They are readily distinguished by length of tail. 



For measurements see table, page 40. 



SYLVISOREX GEMMEUS Heller. 



Plate 7, figs. 5, 6. 



1910. Sylvisorex gemmeus Heller, Smithsonian Misc. Coll., vol. 56, No. 15, p. 7. 

 December 23. (Rhino Camp, Lado Enclave; type in U. S. Nat. Mus.) 



S'pecimens. — Tliirtj^-seven, from the following localities: 



Lado: Rhino Camp, 2 (Loring). 



British East Africa: Kaimosi, 35, including 19 i]i alcohol 

 (Heller, Turner). 



The two specimens from Lado Enclave can be -matched in every 

 particular by skins and skulls in the series from Kaimosi. This form 

 will eventually, without much doubt, prove to intergrade with 

 Sylvisorex sorella Thomas, of Nyasaland. The form described by 

 Doctor Lonnberg from the Isiola River, Northern Guaso Nyiro, as 

 Sylvisorex sorelloides,^ appears from the description to be very closely 

 related. Thomas has named a subspecies from southern Uganda, 

 Sylvisorex gemmeus irenc ^ based on a sUght color difference. 



SYLVISOREX MUNDUS Osgood. 



1910. Sylvisorex mundus Osgood, Field Mus., Zool. Ser., vol. 10, No. 3, p. 18. 

 April 7. (Kijabe, British East Africa; type in Field Mus. Nat. Hist.) 



Specimens. — Five, including 3 in alcohol, from — 



British East Africa: West side of Mount Kenia, 7,000, 8,500, 

 and 10,000 feet (Loring, Heller, Mearns). 



Tlie two skins are slightly browner, less blackish-brown, than the 

 type-specimen, which is in fresh pelage, but are otherwise virtually 

 indistinguishable . 



1 African Game Trails, Amer. ed., p. 487. 1910. 



2 Ann. and Mag. Nat. Hist., ser. 8, vol. 9, p. 67. January, 1912. 



3 Ann. and Mag. Nat. Hist., ser. 8, vol. 16, p. 151. August, 1915. 



