Petrodromus and Rhynchoeyon. 369 



the form next north of if, that of Beira and Gorongoza, 

 by its generally duller coloration, and especially by the 

 practical absence of the prominent buffy on the thighs. I 

 liave named it in honour of its donor, to whom we owe such 

 interesting series of the mammals of the Chirinda Forest. 



Pelrodromus (Mesodenus) ?nossambicus, sp. n. 



Most nearly allied to P. rovumce, but the palate much more 

 complete and the belly-hairs not white to their bases. 



Size and general characters quite as in P. rovumce. 

 Colour apparently as in that species in most respects, but, as 

 the specimens of both are in spirit, no exact comparison is 

 possible. It is, however, evident that while in the type of 

 rovumce the belly-hairs are white quite to their bases, that of 

 mossambicus has, as is usual in the genus, the bases of all the 

 ventral hairs slaty. In both the chin-hairs are completely 

 white and those of the chest slaty-based. Rump broadly 

 naked, or, rather, clothed with an exceedingly fine pubes- 

 cence quite different from the general fur. 



Skull with its palate about as complete as in average 

 female* specimens of Cercoctenus, markedly more perfect 

 than in rovumce, in which the vacuities are as large as or 

 larger than in Petrodromus (s. s.). Other characters as in 

 that species. . Ectopterygoids rather narrow, the lines of their 

 outer edges making an angle of about 40°. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Head and body 170 mm.; tail 148; hind foot 49' 5 ; 

 ear 31. 



Skull : greatest length 50*5 ; condylo-basal length 47 ; 

 zygomatic breadth 2b > *5 ; nasals 20 x 3*8 ; interorbital breadth 

 9 ; palatal length 28' 7 ; breadth across pterygoids 7*5 ; 

 upper tooth-series 26'5 ; //* and two molars 0. 



Hob. Cabaceira, Mozambique. 



Type. Adult female in spirit. B.M. no. G4. 12. 0. 1. 

 Collected and presented by Sir John Kirk. 



This is the female specimen recorded as P. rovumce 

 "without exact history " in my original description of that 

 animal. But I have since found out that it came from Caba- 

 ceira, a distance from the Rovuma quite sufficient to render 

 the differences above noticed worthy of recognition. From 

 P. (M.) nigriseta, Neum., to which I assign a specimen from 



* Throughout the group male skulls lave on the average rather more 

 complete palates than female, though there are many exceptions to this 

 rule. 



