DIPODILLUS WATERSI. 
263 
Measurements of skull of c? No. 2 :—Greatest length 26 mm. ; greatest breadth 15 ; 
breadth of brain-case 13-5 ; temporal constriction 5’2; length of nasals 10 ; basal 
length 22 ; length of palate 10 ; incisive foramina 4’5 ; molar series 3‘6. 
The only three specimens known were preserved in alcohol along with other small 
animals. The labels unfortunately perished, so that the exact locality from which 
they were obtained is unknown. —W. E. db W. 
Dipodillus wateksi, de Winton. 
Gerbillus {Dipodillus) watersi, de Winton, Nov. Zool. vol. viii. 4, 1901, p. 399 , pi. xx. 
Durrur, Jan. 28, 1894. 
Size, smallest of the known species of this genus found upon the African continent. 
Soles of feet naked; the usual six tubercles on the sole of the hind foot are 
surrounded by a finely granulated or shagreened surface. Tail long, the longer hairs 
towards the extremity forming a moderate crest and pencil. The colour dun-fawn above, 
with the usual characteristic pale spots above the eyes and behind the ears; the cheeks 
and the area beneath the eyes dull fawn ; the whiskers mostly black; the whole of 
the under parts white, clearly defined from the dark colour of the upper surface. Tail 
distinctly bi-coloured, dark, often blackish, above, pale fawn or sometimes whitish 
beneath. The colour generally brighter than in D. quadrimacidatus, and the white 
around the eyes and at the base of the ears more pure. 
Measurements taken from specimen in alcohol:—Head and body 77 mm.; tail 
without hair 108 ; hind foot 21; ear 10. 
Measurements of skullGreatest length 25 mm.; greatest breadth 14; length of 
nasals 9 ; frontal constriction 4 6 ; basal length (c.) 20 ; length of palate 10-5 ; incisive 
foramina 4 ; molar series 3‘3; width outside molars 5 2. 
The nasals are proportionately shorter than in I), quadrimacidatns, the maxillary 
portion of the zygomatic arches less developed, and the squamosal portion barely, if at 
all, wider than the auditory meatus; the base of the skull is somewhat constricted. 
This species was first discovered near Shendi by Messrs. Rothschild and Wollaston. 
The nearest allies are probably 1). dasyunis, Wagn., from Arabia, and I), nanus, 
Blanford, from Persia.— W. E. de W. 
