276 DR. S. E. GRAY ON MR. DU CHAILL'u's [Juilfi 25, 



SciURUS NORDHOFFii, Du Chaillu, I. c. p. 363. 



This is a dark state of Sciurus stangeri, Waterhouse. It has 

 the characteristic short black streak behind the ears of that species 

 ■well marked. 



Sciurus eborivorus, Du Chaillu, I. c. p. 3C3 ; Travels, p. 282, 

 t, 41. Mboco, or Ivory-eater, 



This is likewise a state of fur of S. stanr/eri with red feet ; it also 

 has the streak at the back of the ear well marked. 1 



I may observe that the Common Rat eats elephant's tusks, and 

 is said to choose the best. 



Sciurus wii^sonii, Du Chaillu, I, c, p. 364. 



This is also probably a state of fur of Sciurus stangeri, ; but it 

 may be distinct, as the black streak behind the ears is not to be seen. 

 If it is distinct, it is very nearly allied to that species ; but I think 

 it probable that, when more specimens are obtained, they may all 

 three prove to be only a single species. 



It agrees with Sciurus mutabiUs, Peters. 



^l 



Sciurus subalbidus, Du Chaillu, I. c. p. 365. 

 This is the Sciurus rufohrachimi of Mr. Waterhouse. 



Sciurus rubripes, Du Chaillu, I. c. p. 366. 



This is Sciurus pyrrhop^is of F. Cuvier. The two specimens in the 

 collection differ from the IMuseum specimen in being larger, and in 

 having the crown of the head and legs deep bay ; but this is just the 

 character of a more adult animal. 



It is to be observed that the Sciuri are exceedingly variable in 

 their colour, even specimens taken in the same locality and at the 

 same time ; and M. Temminck has shown that they present two states 

 of fur and colour according to the seasons. 



Sciurus minutus, Du Chaillu, /. c. p. 366 ; Travels, p. 453, 

 t. . Keudo Squirrels, not characteristic. 



I have not seen this species before. The figure, which I think I 

 recognize as copied, gives little or no idea of the character of the 

 species. The tail is varied ; that is, it has a pale-edged darker 

 border. 



I beheve it is Sciurus palliatus, Peters, Monatsb. 1852, p. 2/3 ; 

 Reise nach Mossambique, p. 184, t. 31. f. 1, t. 32. f. 3, skull. 



Tragelaphus albovittatus, Du Chaillu, I. c. p. 299 ; Travels, 

 t. 44. p. 306. 



This is evidently only a specimen of Antilope ewijceros of Ogilby, 

 P. Z. S. 1836, p. 120; Tragelaphus euryceros. Gray, Cat. Ung. 

 B. M. 137. 



Mr. Du Chaillu observes, "In coloration it somewhat resembles 

 the T. euryceros, Gray." Yet in the 'Athenaeum Journal,' 2oth 

 May, 1861, he states " that he now for the first time brings a skin." 



