230 ON MAMMALS PROM EGYPT AND SINAI. 



in Egypt ; the Egyptian form is thei'efoi'e undescribed, and I 

 propose for it the name 



ACOMYS RUSSATUS iEGYPTIACUS. 



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



Very similar to Acomys russatus AVagner, but smaller and mvicli 

 brighter and yellower in coloration. Character of the fnr spiny 

 throughout, except on the vent, shoulders, thighs, and side of the 

 face. General colour above bright oi'ange-brown, each spine Avitli 

 a minute tip of dark brown, which, however, is not sufficient to 

 affect the general coloration. Hands, feet, and under parts 

 greyish white, shading into the colour of the upper parts with no 

 definite line of demarcation. Skin of ears and tail black, thickly 

 covered in the case of the ears with greyish hair on both surfaces 

 and in the case of the tail with short greyish spines. There is a 

 small but conspicuous white spot below the eye. 



The skull, which I described in my previous paper, has the 

 snout rather shorter and broader than its allies and the bullae 

 considerably larger, while the teeth and length of the molar series 

 are also of greater dimensions. 



Measurements of type (in fiesh). — Head and body 91 mm. ; tail, 

 damaged ; hind foot 17 ; ear 16. 



Skull — Greatest length 27 mm., basal length 22, greatest 

 breadth 13; palatal length 12-5; diastema 7'5 ; length of molar 

 series 5 ; length of nasals 10. 



Tgpe. Coll. J. L. B. No. 306. J adult. Wadi Hof, near 

 Helouan. Collected by Mr. M. J. Nicoll, 29th October, 1909. 



As compared with the true A. russatus this form would appear 

 to be rather smaller and much brighter in coloration. 



Measurements of an adult 5 (in the flesh) of the typical race 

 are : Head and body 115 mm. ; hind foot 19 ; ear 18 ; it is therefore 

 considei-ably larger than the Egyptian form. Except in size the 

 skulls of A. r. cegyptiacus and the typical form are very similar. 



The skull-measurements of A. russatus, typical race, are as 

 follows : — Greatest length 30 mm., basal length 25, greatest 

 breadth 15; palatal length 13*5; diastema 8; length of molar 

 series 5*5 ; length of nasals 11 •5. 



Spalax ^gyptiacus Nehring, 



Spalax typlnis Pall., Anders. P.Z. S. 1892, p. 472. 



Spalax cegyptiacics Nehring, SB. Gesellsch. natvuf. Fr. Berlin, 

 1897, p. 180; id. ibid. i900,"p. 210; deWint. in Anders. ZooL 

 Egypt, Mamm. p. 168 (1902). 



Two examples of this scarce and little-known Rodent were 

 received from Mai^yut in the Delta. 



Lepus sinaiticus Hemp, et Ehr. 



Lep>us sinaiticus Hempc'et Ehr. Symb. Phys., Mamm. ii. pi. 14. 



