6 



MR. OLDFIELD TilOMAS OX [May G, 



77 78. Lounioulieh. 6-7/6/1. 



80.81.82. Shup. 8-9/6/1. 



101. Ain Hammam. 24/6/1. 



154. W. Aggar. 25/7/1. 



I can find no satisfactory distinction between these specimens 

 and topotypes from Lower Egypt. 



The Alo-erian representative of G. gerbiUas is Latastes 

 G. Urtipes^ A specimen in his collection — No. 1595 — one of the 

 co-types labelled by him, has the molars 1-4 mm. in breadth. 

 Should he prove to have mixed up any other form among his 

 ra,ther diverse series, this skull, the length of which (28-5 mm.) was 

 o-iven in the original description, might be considered as the type. 



7. Gerbillus eatoxi, sp. n. 

 118. W. Agarib. 3/7/1. 

 147.148.149.151. Elcusher. 24/7/1. 

 159. W. Aggar. 26/7/1. 



A repi-esentative of the Egyptian G. andersoni de Wint. 

 General colour comparatively dai-k, finely lined with brown, very 

 difi"erent to the brilliant clear tone of G. hirtipes. Feet short 

 and stout, shorter than in G. hirtipes. Tail with its crest short, 

 but distinctly blackened, the longest hairs about 4 mm. in length. 

 Skull with a larger and moi-e i-ounded, bulbous, brain-case than 

 in G. andersoni ; bullae also rather larger than in that species. 

 Dimensions of the type :— 



Head and body 93 mm. ; tail 128 ; hind foot (s. u.) 25 ; ear 13. 



Skull — greatest length 29; basilar length 21 ; zygomatic breadth 



16; nasal length 10'6 ; interorbital breadth 5'7 ; brain-case, 



breadth 14; diastema 7*3; palatal foramina 5*1 ; length of upper 



molar series 4'1 ; gi-eatest diameter of bulla 10'8, 



Hah. of type. Elcusher. 



Type. Male, not old. Original number 149. Killed 24 Julv, 

 1901. 



This Gei-bille represents the Egyptian G. andersoni de Wint., 

 and is distinguished from that animal by its larger and more 

 bulbous brain- case. 



Besides their other diiferences in colour and proportions, the 

 three forms of Hairy-footed Gerbille obtained by Mr. Dodson 

 are distinguishable by the breadth of their molars, G. p. tarahuli 

 having these about 1*7 across the broadest part of m\ G. eatoni 

 1-5 or 1*6, and G. hh'iripes I 'A. An old specimen with worn teeth, 

 collected by Mr. 0. Y. Aplin in Tvmis in 1895, and also pre- 

 sented to the Museum by Mr. Whitaker, seems likewise to be 

 i-eferable to G. eatoni. 



I have named this pretty Gerbille in honour of the Rev. A. E. 

 Eaton, to whose collections from Algeria our ability to work out 

 any North- African Muridse is largely due. The old inexactly 

 labelled material is of little use, and Mr. Eaton's specimens are 

 the only ones in the Museum from Algeria collected in proper 



