SCIENTIFIC RESULTS FROM THE MAMMAL SURVEY. 79 



From the sknll of R. r. frugivoms it differs principally by its 

 smaller size and shorter post-molar length — the latter chai-acter 

 being due chiefly to a shortening of the pterygoid fossse. 



Local variation. — The following are the dimensions and notes on 

 the coloration of the more important specimens from each of the 

 dijBerent localities : — 



Sakot (1.200'). 



•132 774 $, 11 Jan. 1912, 164—221—31—26, Weight 4| 

 OZ8., (Type) V^entral hairs white throughout but with a trace of a 

 yellow tinge ; as regards the upper parts only the flanks and feet 

 are lighter in colour than are the dark-bellied rats from this locality. 

 The present specimen has 1 2 mammae. 



Dhain (1,400'). 



.128 879 c? , 5 Feb. 1912 153— 211— 31— 22, Weight 4^ ozs. 



.129 880 c?, 5 „ „ 161—220—32—23 „ 4^ „ 



.130 901 d, 11 „ „ 153_200— 33— 22 „ 4 „ 



•133 873 2,3 „ „ 147—197—32—21 „ 3^ „ 



Of these specimens No. 128 has less black on the back and 



lighter feet than has No. 127, a dark-bellied rat from the same 



locality ; the ventral hairs have deep slaty bases and a strong 



superficial wash of pale yellow. Nos. 129 and 130 are similar 



dorsally ; but the ventral hairs (except for a few with grey bases on 



the chest of 129) are white throughout and their feet are white. 



No. 133 is like No. 130 but greyer on the back. Among the 



unregistered specimens Nos. 800 and 871 have white bellies and the 



ventral hairs light throughout ; No. 881 has some hairs on chest 



with slaty bases and a well marked yellow wash. In some of the 



specimens the contrast between the dirty white or yellowish tinge 



of the belly and the grey flank colour is not very sharp. 



BoRi (1,000'). 



914 tj, 17 Feb. 1912, 134—180—30—22, Weight 2^- ozs. 

 d, 27 „ ,. 182-188-32-25 „ 2| „ 

 9 $, 21 „ „ 173—232-34—25 „ 5^ „ ^ 

 The two young males have thick soft fur ; in No. 914 the belly is 

 Apodemus-\ike, the \entral haii-s having deep slaty bases and white 

 tips with a well marked pectoral stripe and collar of huff; in No. 

 938, noted as having the testes fully developed, the ventral hairs 

 are pure lemon colour to their bases. In the old female the fur is 

 thick, but short and much harsher than in the young ; the back is 

 yellowish-brown, brighter than in the young, and with much black 



