U8 



^Ir. O. Tlioinns on 



Sonialiland. Coiujiaved with u scries from Sliendj, the 

 gromul-cohnir is ■warmer, being near " warm Imff " in ;>//- 

 t/at'ffiis, while it is "pinkish ciunanion '' in acticola; but the 

 variation in tlie colour of these desert-animals is so great that 

 not much stress can be laid upon it. Sides lighter, line of 

 demarcation high up. Postoibital and postauiicular white 

 patches well marked. Fore limbs wholly, hind limbs mostly 

 white. Hind S'>les with a nearly naked stripe running along 

 the inner s^ide almost to the base of the hallux. Tail biiffy 

 above, white below ; the teiniinal crest inconspicuous, 

 brown. 



Skull of the same stoutly built elongated form as in 

 piigargus^ the supraorbital beads similarly strongly developed, 

 liullfo of similar shape, but decidedly larger tlian in any of 

 the considerable series available oi j^jjijdrgHS i\xn[ pi/ramidian. 



Dimensions of the type (measured in the flesh) : — 



Head and body 118 mm.; tail 144; hind foot 29; 

 ear 15. 



Skull: greatest median length 32*5; greatest diagonal 

 length 32 ; condylo-incisive length 28'5 ; zygomatic breadth 

 17'4; nasals 12'7; interoibital breadth G'6 ; breadth of 

 brain-case 11'5 ; breadth between meatal edges 16"3 ; zygo- 

 matic plate 4*7; palatal foramina, anterior 5*4, posterior 3 ; 

 bulla?, horizontal diagonal length 12 ; breadth at right angles 

 to last, excluding meatus, 7 ; greatest diameter in any 

 direction 12'7; upper molar series 4*1. 



Bab. Coast region of N. Somali. Type from Berbera, 

 other specimens from Bulbar. 



T^jye. Adult female. B.M. no. 7. 11. 5. 4. Original 

 number 32. Collected 30th July, 1905, and presented by 

 Dr. R. E. Drake Brockman. Nine specimens. 



'Ihis Somali representative of G. pygargufi, distinguished 

 by its larger buUre, is the species mentioned on p. 119 of 

 Dr. Drake Brockmai.'s 'Mammals of Sonialiland ' (1910) as 

 the Coast Gerbil, a title I have Latinized as above. 



Gerh'dlus vallinns, sp. n. 



A Gerbillus with an unusual amount of the soles naked and 

 with very large bulla?. 



Size about as in G. preba. Fur long and loose. General 

 colour strong sandy buffy, near " cinnamon-bufF," not so 

 inclined to russet as in G. pcbba. Line of demarcation on 

 sides not very sharply defined. Lighter postorbital and post- 

 auricular markings scarcely perceptible. Ears short, their 



