226 MR. J. LEWIS BONHOTE ON ' 



the material at hand is not at present sufficient to admit of any 

 definite conclusions being arrived at. 

 Tlie measurements are as follows : — 



J . No. 358, J. L. B. : Hd. & b. 128 mm. ; tail — ; h.ft. 38 ; ear 17. 



6 . No. 359 J. L. B. : Hd. & b. 126 mm. ; tail 143 ; h.ft. 34 ; ear 17. 



2 . No. 360, J. L. B. : Hd. & b. 116 mm. ; tail 143 ; h.ft. 32 ; ear 17. 



Least supra- Length of 



Greatest Greatest orbital Basal Length of molar 



hkulis. length. breadth. breadth, length. nasal. series. 



c?. 358... 37 mm. 19 18 30 15 6 



cJ. 359... 38 „ 20 8 30-5 15 6 



$. 360... 35 „ 18-5 7 28 13-5 5 



Gerbillus gerbillus Oliv. 



Dipus gerhillus Olivier, Bull, des Soc. Phil. Paris, ii. p. 121 

 (1801). 



Gerbillus gerhillus Oliv. ; de Wint in Anders. Zool. Egypt, 

 Mamm. p. 252 (1902) ; Bonh. P. Z. S. 1909, p. 792. 



The collection contains two more of this pretty and common 

 Gerbille, one from the desert near Giza and the other from the 

 Ivhargeh Oasis. In spite of its wide range this species is 

 remarkably constant both in size and coloration. 



Meriones crassus Sundev. 



Meriones crassus Sundev. Iv. Vet.-Ak. Handl. p. 233, j)l. ii. 

 fig. 4, cranium (1843). 



Gerbillus selli/sii Pomel, C. R. Acad. Sci. xlii. p. 654 (1856). 



Meriones shawi Riipp. ; de Wint. in Anders. Zool, Egypt, 

 Mamm. p. 266 (1902) (partim). 



I have lately received from Capt. Flower an example of Meriones 

 a^assus from Tor in Sinai. As this species was originally 

 described from Sinai, this example represents the typical form of 

 the species. It differs from that found in Lower Egypt in 

 being slightly larger, with a more pointed snout and a much 

 longer and stouter tail. The Egyptian specimens recorded by 

 me in a former paper agree well wdth a series from Tripoli in 

 the British Museum, which are practically topotypes of Pomel's 

 species, and I have now^ no hesitation in referring them to this 

 form. Tliis I was unable to do before, owing to my having no 

 typical a-assus with which to compare them. 



The form of Meriones found in the Sudan is much paler than 

 that found in Lower Egypt, and I propose for it the name 



Merioxes crassus pallidus. 



Abstract P. Z. S. 1912, p. 3 (Feb. 13). 



Meriones crass2is selli/sii Pomel, Bonh. P. Z. S. 1909, p. 793 

 (partim). 

 . Very similar to M. crass^^s selli/sii, but much paler, atid the 



