ons Mr. (\ Thomas 07J Gerhils 



Dimensions of the type : — 



Ile.'Kl and body 142 mm.; tail l.')3 ; hind foot 34; 

 ear 20. 



Skull : median length 40-5 ; dinp;oiial leng-tli 42 ; zygo- 

 matic breadth 22; interorbital breadth 7'6 ; bimeatal breadth 

 2o ; palatine foramina 8 2 ; upper molar series 5"3. Biillai: 

 diagonal horizontal k'ngtii 17*5 ; front of nieatal swelling 

 to back of bulla 15'I ; suprameatal triangle, length 4-5, 

 lu'iglit 3'2. 



Jhib. Tri|)oli. Type from Ferdjan, a second specimen 

 from Kl Hammam. 



Ti/pe. Adii't male. B.M. no. 2. li. 4. 56. Original 

 number 97. Collected 21st Jiin.^, 11)01, by E. Dodson. 

 I'resented by J. I. S. Whitaker, Esq. 



This is a long-tailed form of the b grouji, uith largest- 

 sized bullae but small suprameatal triangle. It occurs 

 between the original libf/cits of Lower EgNpt and schoushoei 

 C)f Algeria, which have both comparatively short tails, and 

 are, indcedj veiy doubtfully distinguishable from each other. 



Meriones syrius, sp. n. 



Nearly allied to AF. eri/throurus, but with longer foot and 

 larger teeth. 



General cliaracteis quite as in erytliroiirus, with the same 

 proportions of the bulla and approximately the same colora- 

 tion of body and tail. Upper surface near " pinkish buff," 

 paler and more approaching- "light buflf" on sides. Under 

 surface white, but the hairs pale slaty basally except on the 

 chin and throat, where they are white to the roots. Light 

 areas behind ej'es and round bases of ears not strongly 

 marked. Ears like head, the flinging hairs buffy white. 

 Hands and feet white, more or less washed with buffy oti the 

 mctapodials. Tail ochraceous, the terminal crest \vA\ deve- 

 loped, black, commenting rather moie than halfway along 

 the upper side. 



Skull aj)})arently like that of erathroums, though rather 

 more robustly built. Bullae equally large, with a marked 

 ii.flation on the front side of the meatus just surpassing the 

 level of the liindermost point of the zygoma. 



Incisors less bevelled and with less sharply defined groove 

 than in erythrourus. Molars distinctly smaller. 



Dimensions of the type : — 



Head and body 142 mm.; tail 145; hind foot 35; 

 ear 18. 



Skull : median length 42*5 ; diagonal length to back of 



