210 



IVirS (SURIFER) FLAVIGRANDIS. 



Kloss, A7in. and Mag. Nat. Hist. (8), vii., p. 119, 1911. 



Type.— Adult male (skin and skull), No. 2220/10, Selangor Museum, 

 collected on East Perhentian Island, ofETrengganu, east coast of the Malay 

 Peninsula, 12tli September, 1910,hv C. Boden Kloss. Original No. 3628. 



Characters. — In size sub-equal to M. (jrandh but with a slightly 

 larger hind-foot ; pelage somewhat brighter ; sides of muzzle and 

 lower cheeks yellow, not white ; white area of throat much narrower ; 

 scrotal area largely tawny. Skull generally similar but the nasals 

 extending posteriorly lieyond the lachrymal notch. 



Colour. — Upper-parts ochraceous, clouded and darkened on 

 shoulders, back and rump with the dark brown tips of the spines, but 

 clearer on the top of the head and almost pure on cheeks and sides of 

 neck, fore-limbs, sides and thighs where it becomes buff- ochraceous ; 

 top and sides of muzzle greyish-brown, 



Under-parts white, this colour continued to fore-feet and down the 

 inner sides of thighs but not quite reaching the ankles ; a slight 

 ochraceous gorget ; scrotvim partly ochraceous. Viewed from below 

 the yellow sides of head and neck are distinctly visible. 



Fore- and hind-feet white above ; tail black above, paler at tip ; 

 white below. 



Skull and Teeth. — The skull of Mas flnv'ujrandis resembles that 

 of Mas (jraiid'is save that the nasal bones are prolonged posteriorly 

 beyond the anterior edges of the lachrymal notches. 



Measurements.- Collector's external measurements of type : head 

 and ]»ody, 208 ; tail, 180 ; hind-foot, 43 ; ear, 23. Cranial measurements : 

 greatest length, 48 (48.8) ; * basal length, 42 (43.5) ; palatal length, 22 

 (23) ; nasal length, 20.7 (20.8) ; shortest distance between tip of nasals 

 and lachrymal notch, 19.2 (19.9) ; diastema, 14 (14.8) ; molar row, 7.4 

 (7.8) ; length of foramina, 7 (7.^) ; breadth of combined foramina, 3.9 

 (4); zygomatic breadth, 21.5 (22.8); cranial breadth, 17.2 (16.8); 

 depth of rostriun at anterior extremity of foramina, 9.1 (9.9) ; 

 }»readth of rostrum midway between henselion and foramina, 7.4 (8.1). 



Specimens Examined. — Nine, all from the type locality. 



Remarks. — These specimens are in the same al^raded state as 

 the series of Mus fjrandis but they convey an impression of rather 

 greater brightness of the upper-parts. The relative positions of the 

 posterior terminations of the nasals and the shape of anterior roots of 

 zygomata, together with the narrower white throat and absence of any 

 pale area at the roots of the vibrissse render separation of this form from 

 Mus yrandis very easy. Though the pale vibrissse patches are not 

 uniformly pi-esent in individuals of all the other races of Mus surifer, 

 they are to be seen in the great majority of cases, and the entire 

 absence of these in Mas Jiaviyrandis is, for differential purposes, a 

 useful character, the l)est of which are, however, the great size and 

 robust skull as in Mus (jrandis, together with the peculiar nasal feature 

 above referred to. 



* Measurements in parentheses those of a female with woni teeth from the 

 trpe locality, S.M. 2222/10. 



