272 On Gerbils referred to the Genus Meriones. 
Dimensions of the type (measured on a skin) :— 
Head and body 140 mm.; tail 131 ; hind foot 32°5. 
Skull: median length 39; diagonal length 39; zygo- 
matic breadth 23°5; nasals 14°3; interorbital breadth 8 ; 
bimeatal breadth 21; palatine foramina 7°6 ; upper molar 
series 5°6. Bullee: diagonal length 14; meatal length (back 
of bulla to front of meatal swelling) 11; suprameatal triangle, 
length 3°9, height 3:1. 
Hab. Lower. Egypt. Type from Ramleh, near Alexandria. 
Type. Adult male. B.M. no. 92. 7.1.6. Collected and 
presented by Dr. John Anderson. 
This is in part the ‘ Mertones shawi, var. melanurus” of 
Anderson: and de Winton’s ‘Mammals of Egypt,’ but, as 
already explained, it seems best to apply the name melanurus ° 
to the form which has the prominent black tuft to the tail, 
and so agrees with Riippell’s figure and description. That 
name being disposed of, and the species being distinguished 
from the Algerian guyont by its broader interorbital region, 
a new name becomes necessary for it. 
Meriones blackleri lycaon, subsp. n. 
General characters of true blackleri of Smyrna, but the 
colour warmer and more ochraceous and the tail without the 
white tip which occurs in all our four specimens of blackleri. 
Colour of back approaching cinnamon-buff ;_belly-hairs white 
to their bases. A whitish patch between eye and muzzle, 
behind eyes, and a small one beliind ears. Hands and feet 
white ; soles with but a narrow area along the centre of the 
proximal half naked. Tail buffy whitish, the terminal crest 
extending for about 2 inches at its end, not heavily developed, 
blackish, not becoming white at the extreme tip. 
Skull averaging rather larger than in blacklert, but the 
specimens are mostly older. Palatine foramina ending quite 
in front of the roots of m’, those of black/eri attaining the 
level of these latter. Bullee slightly larger. 
Dimensions of the type :— 
Head and body 129mm. ; tail 146; hind foot 33 ; ear 20. 
Skull: greatest median length 415; diagonal length to 
back of bulle 41; zygomatic breadth 22° A; nasals 17° (ee 
breadth across prance 17'L; bimeatal breadth 20 ; palatal 
foramina 7°3 ; upper molar series 5°2. Bulle: length 12°35 
front of meatal swelling to back of bulla 9. 
Hab. Kara Dagh, Lycaonia, Asia Minor. Alt. 3800! 
Type. Adult male. B.M. no. 8 7. 1. 28. Original 
