748 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI 



Named in honour of Sir P. Z. Cox, to whose assistance the 

 obtainino- of a number of the Mesopotamian specimens is due. 



4. Paraechinus ludlowi, sp. n. 



Nearly allied to P. dorsaUs, And. and de Wint., but far paler. 



General essential characters as in P. dorsalis, these, of course, 

 including the peculiar enlarged buUas and hollow pterygoids 

 characteristic of Paraechinus, as compared with Hemiechinus, to which 

 the other and more common Mesopotamian hedghog, H. auritus, 

 belongs. 



Size about as in dorsalis. Coloration on the same plan as in 

 that animal, there being similarly a darker median dorsal area 

 with light sides. But on the darker median part, which is about 

 1-2 inches broad, the spines have only one subterminal dark band 

 (about 4 mm. in length and beginning 4 mm. from tip of spine) 

 instead of two, those of dorsalis having a second dark band lower 

 down. And on the light coloured sides the spines are for the most 

 part completely white, without any dark band at all, those of 

 dorsalis having here always one dark band and sometimes a second 

 one. Spines of back about 24 mm. in length. Undersurface wholly 

 white. Muzzle and a narrow line up forehead brown. Limbs 

 whitish, darkening terminally. 



Skull, so far as can be judged from a somewhat immature 

 example, quite like that of P. dorsalis. 



Hindfoot, as measured by collector, 34 mm. ; ear, 43. 



Skull (immature), greatest length, 49-5 ; condylo-basal length, 

 49; zygomatic breadth, 28-7; nasals 14-5 x 3-7; interorbital 

 breadth, 12-5; palate length, 25-6; upper tooth series, 25-2; front 

 of p' to back of m", 11-7. 



Habitat of type. — Hitt, on the Euphrates, about 100 miles West 

 of Baghdad. Altitude about 400'. 



Type.—lmmsktwve male, B. M. No. 19.3.1.4. Original number 

 4. Collected 8th August, 1918, by F. Ludlow. 



This hedghog, which is widely different fiom the common 

 H. auritus, seems to be only related to Paraechinus dorsalis, dis- 

 covered by Mr. Theodore Bent in the Hadramaut, S. Arabia. It 

 differs, however, so markedly in coloration that it should evidently 

 be distinguished specifically. 



5. Gerbillus cheesmani, sp. n. 



A Gerbil with the general appearance of G. (jerbiliits, gleadoivi, and 

 ajidersom biTt with larger bu.lla3 and smaller teeth than any of them. 



External characters very much as in G. andxrsoni, with which 

 the species shares the more normal proportions of the feet and the 

 less tufted tail as compared with the common Egyptian Gerbil, 

 G. gerhillus. Colour as usual bright sandy buff above, pure white 



