30 GYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL 150RNE0. 



whitish area, continued as a narrow line clown the underparts of the body. Indi- 

 vidual hairs of lower parts ashy grey at base and påle rusty red at tips. Round 

 the eyes a well-marked blackish ring. Sides of body and parachute dark blackish 

 brovvn, the latter with some scattered rusty brown hairs. Outer edge of parachute 

 almost white, becoming broader and pure white along the outer edge of the legs. 

 Parachute below like the underparts of the body. Arms and legs blackish brown 

 with some rusty red hairs, especially on the former; the hind legs considerably darker 

 and less rusty. Tail påle cinnamon at the base when seen from below, otherwise 

 »mummy brown» (Ridgway plate XV) both above and below, the individual hairs 

 much lighter at base; tail distinctly distichuous and somewhat tapering form root to 

 tip; whiskers pure black and rather long (about 65 mm.). Two short cheek bristles 

 on each side; ears thinly clad with short blackish hairs; no tufts at base of ears. 



Skull and teeth: In the original description of Sciuropterus (Hylopetes) harrisoni 

 (Proc. Acad. Sci. Philadelphia, vol. 52, 1900, p. 462) nothing is recorded about the 

 skull and teeth, why a comparison is impossible, as I am also lacking specimens of 

 that species. However, both harrisoni and this new form clearly belongs to the Sub- 

 genus Hylopetes as defined by Thomas in his review of the squirrels belonging to 

 the Sciuropterus-growp (Ann. Mag. Nat. Hist., ser. 8, vol. 1, 1908, pp. 1 — 8). In H. 

 harrisoni caroli the molar pattern consists of two transverse ridges converging inter- 

 nally towards the central part of a longitudinal crest; there is no projecting angle 

 on the outer edge and the postero-internal cusp is very feebly developed. F 4 is, 

 however, not larger than m 1 , but distinctly smaller, though more triangulär in shape 

 than the latter. The molar ridges are well developed. Five cheek teeth are present, 

 thus p 3 being present and well visible externally. P 3 is, however, small, though most 

 certainly functional. The anterior external cusp on p 4 is of about the same size as 

 the posterior external one. The audital bulla? are well inflated, but not clouble. 

 Besides these points of characteristic the skull of H. harrisoni caroli is remarkable 

 in the following particulars. The foramina ovalia are exceedingly large, somewhat 

 elliptical in shape, and measuring 2.2 mm. on their longest (horizontal) diameter. The 

 nasals, which are highly tapering off posteriorly, extend some distance behind the 

 fronto-maxillar suture. The foramina lacera media are also comparatively large and 

 almost of the same size as the foramina ovalia. 



Measuraments: External measurements of type taken in the flesh : Head and 

 body: 164 mm.; tail: 154 mm.; hindfoot: 29 mm.; Ear: 23 mm. 



Cranial measurements of type: Greatest length of skull: 37, s; conttylus to gna- 

 thion: 35,2; basicranial length: 32,2; zygomatic width : 23,2; Jeast interorbital breadth: 

 7,7; postorbital breadth: 9.8; length of nasals mesially: 12,0; breadth of combined 

 nasals at anterior extremity: 5,s; breadth of combined nasals at posterior extremity: 

 3.2; diastema: 8,i; length of bulla?: 7, o; breadth of bulla? : 4,2; mastoid breadth: 18. 3; 

 palatal length: 17,0; length of foramina incisiva: 2.i; breadth of combined foramina 

 incisiva: 1,5; maxillary toothrow (alveoli): 7,5; mandibular toothrow (alveoli): 7,1 ; 

 length of three upper molars (alveoli) : 5, o mm. 



Remarks: According to the investigations of Oldfield Thomas the following 



