1904.] MAMMALS FROM FERXANDO PO, 191 



Coloration of head, undei' surface, and limbs as in true fraseri. 



Skull smaller and with rather a shorter narrower muzzle than 

 \nfi^aseri, the length of the tooth-row decidedly less. 



Approximate dimensions of the type, measured in skin : — 



Head and body 330 mm. ; tail 235 ; hind foot (s. u.) 57. 



Skull — tip of nasals to back of paiietals 53 mm. ; zygomatic 

 breadth 38; nasals, length 14"7, gi-eatest breadth anteriorly 7*4 ; 

 interorbital breadth 16; breadth of brain-case 26; palate length 

 from henselion 22*5; diastema 12'5 ; palatal foramina, 6 ; length 

 of upper cheek-tooth series 11'9 ; lower jaw, incisor-tip to 

 condyle 37 ; length of lower tooth- row 13' 8. 



Hah. Abutschi, Lowei- Niger. 



Ty2Je. B.M. No. 2.11.10.5. Collected February 1902 by Mr. A. 

 Braham. Two specimens, adult and immature. 



Du Chaillu's Anomalurus beldeui, from the Gaboon *, con- 

 sidered by Gray and Alston to be a synonym of A. fraseri, appears 

 to me to be referable i-athei- to the red-backed species commonly 

 known as A. erythronotvs M.-Edw. Considering how widely 

 diffei-ent in coloui- the two species are, it seems curious that thei-e 

 should have been any doubt on the subject ; but Du Chaillu's 

 desci'iption is extremely vague, and it is only from his statement 

 that " on the Imck the haii- is tipped with l^right i-ufous, which 

 gives a rufous tinge from behind the ears to the lower thii-d of 

 the body on the median portion to the connnencement of the 

 membranes," that I am able to express an opinion on the matter. 

 This sentence, however, exactly expresses the dorsal coloration 

 of A. erythronotus, and the locality is approximately the same, 

 while no examples of A. fraseri have been since recorded from 

 the district. 



If I am right in this identification, the name A. heldeni 

 will have to stand for the red-backed species, as it antedates 

 A . erythronotus by many years. 



14. SciURUS STAXGERi Waterh. 

 S.\7. $.35. Fish Town, 10 m. 



5 . 73, 80. Bubi Town, Bantabiri, 500 m. 

 2 , 95. Bantabiri, 10 m. 



S. 166, 168, 173, 177. $ . 161, 170, 172, 175. N. Bantabiri, 

 1800 m. 



c?. 126. Bilelipi, 10 m. 



15. SciURUS RUFOERACHiATUS Waterh. 



cJ. 13, 24, 25, 34, 37, 47. ?. 18, 21, 22, 23, 32, 33. Fish 

 Town, 10 m. 



6 . 3, 4, 6, 10, 39. 2 . 7, 11, 40, 41, 42. Santa Isabel, 10 m. 

 d, 77, 82, 97, 143, 144, 163, 171, 176, 177. $. 69, 89, 169. 



Bantabiri, 500 m. 



S . 54, 139. 2 . 134, 137. Clarence Mountain, 1800 m, 



* P. Bost. Soc. N. H. vii. p. 303 (1861). 



