8 MR. O. THOMAS ON MAMMALS FROM [Jan. 17, 



15. Megaderma frons, GeofFr. 

 a. 2 • Wadelai, 26/G/86. 



16. Anomalurus pusillus, sp. n.^ (Plate I.) 



a. 2 • Bellima, 21/G/83. Ti/pe. 



b. 6 . Tiiigasi, 5/82. 



Size very much smaller than in any of the other species. General 

 colour above uniform dark grizzled grey, the hairs throughout dark 

 slaty grey for the greater part of their length, this colour gradually 

 darkening to black just below a terminal band of pale grey or oliva- 

 ceous. Head and limbs like back ; sides of parachutes rather darker. 

 Underside pale yellowish white, without a tinge of rufous, the hairs 

 on the belly pale slate basally, and dull yellowish white terminally ; 

 outer margins of parachute below covered with coarse dark brown 

 hairs. Tail uniform pale brown, cylindrical, rather bushy, the hairs 

 at its end attaining a length of nearly two inches ; scales about 15 

 in number. 



Skull, as compared to that of A. beecrofti, distinguished by its 

 very much smaller size, short muzzle, proportionately longer pala- 

 tine foramina, longer orbital and shorter temporal fossae, and larger 

 rounder bullae. 



Teeth as usual. Incisors orange above, pale yellow below. 

 Molars readily distinguished by their small size. 



Dimensions of a female in skin : — Head and body (to anus) (c.) 280 

 millim. ; (to back of interfemoral membrane), 300 ; tail 134; hind 

 foot (without claws) 40" ; ear (dried and shrunk) (c.) 20. 



Skull — basal length 41 millim. ; greatest breadth 29 ; interorbital 

 breadth 12"3; height of infraorbital foramen 5'2 ; palate, length 

 21-7; diastema lO'l ; length of palatal foramen O'O ; length of 

 upper molar series 9"4. 



This interesting little animal is most nearly allied to the "West- 

 African A. beecrofti, Fraser, but differs from that species in its 

 duller and less yellow upperside, in the entire absence of rufous 

 on its neck and belly ^, and, as from all the other described species, 

 in its diminutive size. 



17. Sciurus stangeri, "Waterh. 



a. Tingasi, 2/9/83. 



" Common in Monbuttu, where it is called ' Mbonga.' " — E. 



18. SciuRTJS rufobrachiatus, Waterh. 

 o. cf. Bellima, 13/7/83. 



b. <S- Bongereh, 21/7/83. 



c. d. Tingasi, 5/82 and 7/83. 

 " Iride fusca. ' Bonga.' " — E. 



* Preliminary diagnosis published, Ann. Mag. N. H. [5] xx. p. 440, Dec. 1, 

 1887. 



^ In specimen h, an adult male, rather smaller than a. 



^ Young specimens of A. beecrofti are also without the bright rufous on the 

 belly characteristic of the sjjeoies, but the size of their feet and teeth would 

 always distinguish such specimena from A. pusillus. 



