532 PROCEEDINGS OF THE ACADEMY OF [1896. 



One specimen in alcohol represents this distinctly marked species. 

 Should it prove that its peculiar tooth pattern is shared by some 

 previously named but imperfectly described species, the propriety 

 of its subgeueric (if not generic) valuecertainly justifies the possible 

 synonym. The specimen is an old adult with the teeth well worn, 

 but not enough so to destroy the pattern of tuberculation exhibited 

 by earlier'maturity. 



37. Mus minutoides Smith. Smith's Lesser Mouse. 



I follow Oldfield Thomas'® in applying Smith's earlier name to a 

 small, fawn colored mouse which corresponds to Peters' admirable 

 figures of Mus minimus in his Mammalia of Mozambique. 

 Specimens (in alcohol) : 



No. 3,910 Juv. 9 , Sogida Volcano, . . April 7, 1895. 

 No. 3,911 Juv. ^^ , Sogida Volcano, . . April 7,1895. 

 No. 3,912 Ad. ^ , Jire, Sakuyu, . . . . March 20, 1895. 



38. Mus mahomet sp. nov. Sheik Mahomet Mouse. 



Type, No. 3,881, ad. $ ; collection of the Academy of Natural 

 Sciences of Philadelphia. Collected by Dr. A. Donaldson Smith at 

 Sheikh Mahomet, Western Somaliland, Africa, Nov. (?), 1895. 



Description — Size small, slightly larger than Mus minutoides (I. c). 

 Tail well haired, slender, nearly equal to length of head and body. 

 Ears small, rounded and thickly haired ; pelage dense, slightly his- 

 pid, tricolor. 



Color above, dark, black-brown, becoming dark fulvous brown on 

 sides and lower cheeks. Lower parts grayish-white, tinged with 

 fulvous on breast, neck and throat. A distinct lateral band of deep 

 fulvous extends along sides from shoulder to hip and along ham al- 

 most to heel, separating the colors of upper and lower body. Feet 

 hoary brown ; tail above, like back, below, like feet. Basal halves 

 of body hairs everywhere bluish-black. Hind feet with three pairs 

 of tubercles, fore feet each with three anterior and two ^josterior 

 tubercles. AVhiskers medium, black. 



Skull as in typical Mus musculus, except that the inner anterior 

 face of upper incisors is flattened and the bases of nasals extend 

 some distance beyond the upper posterior sutures of the premaxil- 

 laries. Coronoid process of mandible strongly hooked. 



Measurements — Total length 103 mm.; tail vertebrae, 49; hind 

 foot, 14.5 ; ear, from crown, 6.5. 



16 



P. Z. S., 1888, p. 13. 



