46 EINAR LONNBBRG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



a blackish cloud. The tail darkens gradually from pale grey at the base to black 

 at the end. In younger specimens the tail is more or less brown especially in its 

 apical half, but it also will appear that the black in the outer part of the tail fades 

 into brown before it is shed, for some specimens have new hair with fresh colour on 

 the basal half of the tail and the old hair of the apical half more or less brown. 



The length of the tail varies in adult animals from 27 to 29 ^'2 cm. without 

 hair, in the younger it is about 25. 



Total length of skull in an old male specimen with worn teeth 45 mm.; con- 

 dylobasal length 39,3 mm.; basicranial length 34 mm.; zygomatic breadth of skull 



32.4 mm.; length of tooth row from front of canine to back of m' 15,4 mm; length 

 of parietal suture 19 mm.; breadth of braincase 23,5 mm.; length of nasals mesially 



12.5 mm. 



The total length of the skull of a younger animal is 42,5 mm. but the tooth- 

 row has, of course, the same length as in the old animal. 



0. gallarum is an easily recognized species as already pointed out by Thomas. 

 Since G. gallarum was described, Dollman has named another Galago from Somali- 

 land (>Fafan 35 miles east of Harrar») 0. dunni} The latter has, however, a larger 

 skull, and has no fawn or drab colour. 



Another more northern relative is Galago teng (Sundevall). By mistake the 

 type locality of this species is said to be: » Mombasa, Taita>, in Teotjessart's 

 j>Catalogus Mammalium*. Sundevall writes about this: »Habitat in Sennaar et 

 Kordofan, circa Bahr el Abiad», and these words are quoted directly from the col- 

 lector himself Dr. Hedbnborg. 



A direct comparison between a male skull of G. gallarum of this collection and 

 the skull of the male type specimen of G. teng proves the latter to be rather more 

 slenderly built. G. teng has the posterior half of the nasals narrowed (but a little 

 widened again at the end), and the cavities on the sides of the snout more pro- 

 nounced than in G. gallarum. The least interorbital breadth is only 5,2 mm. in G. 

 teng, while the same measurement is 6,2 mm. in G. gallarum. The latter has more 

 outstanding orbits, and much heavier and broader zygomatic arches already in young 

 specimens. On the other hand the tooth row is about 1 mm. longer in Galago teng. 



Galago teng has no drab or fawn colour in its fur and resembles in this respect 

 G. dunni. Another resemblance between these two is the shape of the nasals as 

 described above for G. teng and by Dollman for G. dunni. It appears thus pro- 

 bable that G. dunni may be a subspecies of G. teng. 



1 Ann. & Mag. Nat. Hist. 1910 Ser. 8, Vol. V p. 92. 



