1904,] MAMMALS FROM FERXANDO PO. 18T 



Skull— greatest length 38-2; greatest breadth 25-5; interorbital 

 breadth 5-4 ; breadth of bram-case 19-6 ; front of canine to back 

 of m^* 12-5. 



Type. Adult male, no. 152. B.M. Ko. 4.7.1.8. Killed 6 March,, 

 1904, at an altitude of 1800 metres. 



Compared with 15 well-preserved specimens of the Continental 

 form from localities ranging from the Gold Coast to Uganda, the 

 four skins obtained by Mr. Seimund differ so uniformly by the 

 lightness of their under surfaces, and the pure white of the inner 

 aspect of their limbs, that I think they should have a special sub- 

 speciiic name. 



Galago demidoffi has not been previously recorded as occuri'ing- 

 in Fernando Po, though a skeleton obtained there was received 

 from Sir Richard Burton in 1862, just after the publication of 

 Gerrard's ' Catalogue of Bones of Mammalia.' 



5. ROUSETTUS STRAMINEUS Geoff. 



5 . 108, 110, 114, 115, 117, 118, 119, 124, 125. $ . Ill, 112, 

 113, 116, 120, 121, 122, 123. Bantabiri, 10 m. 



J. 178, 181. $. 87, 105, 106, 179, 184. Bantabiri, 10 m. 



" Very common." — E. S. 



Prof. Bocage also records Hypsignathtt,s monstrosus as having- 

 been discovered in the island by Mr. Newton. 



This fine series of specimens shows a peculiar and very unusual 

 sexual difference in colour which does not seem to have been 

 previously noticed. The males, without exception, are more or 

 less brown, the bright yellowish shoulder-patches contrasting 

 strongly with the general dark colour. The females on the other 

 hand are, both above and below, of the rich yellowish str-aw-colour 

 so often described as occurring in this species. 



For the female of any animal to be more richly coloured than 

 the male is an unusual phenomenon. 



6. ScoTONYCTERis BEDFORDi Thos. (Plate XIII.) 

 Scotonycteris hedfordi Thos. P.Z.S. 1904, vol. i. p. 372. 



$.31. Fish Town, 10 m. 



" Shot during the daytime, hanging on a tree." — E. S. 



This most interesting Bat is the only new species obtained on 

 Mr. Seimund's expedition, and I have thought it worthy of a 

 figure. It is the first member of the genus to be received by the 

 Museum, and is therefore a most welcome accession. 



The previously known species, S.zenkeri Matsch., was described 

 from the Cameroons. 



The external characters of S. hedfordi have been already 

 described, but the following measui-ements of its skull may be of 

 service: — Greatest length 25-4 mm.; basal length 22-6; zygomatic 

 breadth 16-5; interorbital breadth 4-8; breadth of brain- case ll'l ; 

 palate length 14 ; front of canine to back of molar 8*7 ; front of 

 lower canine to back of m^ 10. 



The specific distinction of S. hedfordi rests mainly on the 



