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6 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
accompanying it gives its habitat as the Sinai desert, “Ad vias circa — 
fontes Mosis.”’ ‘The Wells of Moses (Ain Musa) near the west shore 
of the Gulf of Suez, may therefore be considered the type locality. — 
Dr. Phillips obtained two adults near Mt. Sinai, at Wady Feiran and 
Um Shomer respectively, and a third on the eastern side of the Sinai 
peninsula, at Suweira, slightly to the north of Akaba. It therefore 
probably ranges over the greater part of the Sinai desert. Bonhote 
(Proc. Zool. soc. London, 1912, p. 226) has recorded a specimen from 
Tor in Sinai, collected by Capt. S. S. Flower. | 
The peculiar inflation of the auditory meatus causing it to touch 
the angle of the squamosal process, and the posterior enlargement 
of the bullae, so that they extend behind the supraoccipital and 
notably constrict the exoccipitals, may prove to be characters of 
generic value, when the time comes for a revision of the group. The 
pelage is extremely soft and silky; the pale, sand-colored hairs of the 
upper surface of the body are minutely black-tipped. 
GERBILLUS CALURUS Thomas. 
Bushy-tailed Gerbil. 
Gerbillus calurus Thomas, Ann. mag. nat. hist., 1892, ser. 6, 9, p. 76. 
One of the most interesting of Dr. Phillips’s captures is a fine adult 
male of this rare gerbil. Hitherto but three specimens seem to have 
been recorded, all of which are in the British Museum. ‘The original 
specimen is an alcoholic without locality; the second, also an alcoholic, 
is from Sinai, and unfortunately in poor condition; the third is a skin 
with imperfect skull, from Wady Sikait, south of Gebel Sebara, eastern 
Egypt. Dr. Phillips’s specimen (the fourth to be recorded) is from 
the Sinai region at Wady Sa’al. The type was for many years in the 
British Museum before it was made known by Thomas, and it was 
not till the publication of the two other records by Anderson in his 
Zoology of Egypt, 2, Mammals, in 1902, that its probable range was 
indicated. The squirrel-like tail is a remarkable feature in the genus, 
but the skull seems sufficiently typical. The measurements of the 
present specimen are: — head and body 118 mm., tail 145, hind foot 
33, ear 22; skull, greatest length 36.5, basal length 30, palatal length 
19.3, diastema 8.5, zygomatic width 18.7, mastoid width 18.9, inter- | 
orbital constriction 5.5, bullae 14 X 7.5, upper molar row (alveoli) 
= Se a 
