738 DR. A. GUNTHER ON NEW MAMMALS. [Nov. 7, 



as an incisor. The prevailing hue of the head and fore part of the 

 body is a greyish brown ; but towards the large quills the spines are 

 getting whitish at the tip and base. The basal half of the large quills 

 is white, the apical half black with white tip. Slender quills white, 

 with black subcentral ring. Legs blackish*. 



Fig. l a . 



Lower jaw of Hyst.rix orassispinis. 



in. lin. 



Length of body from tip of nose to root of tail 17 



Length from nose to ear 3 6 



Length of tail with terminal quills 6 



Length of fore foot 2 



Length of hind foot 3 



Length of one of the largest quills 7 



Length of one of the hollow caudal quills 6* 



Mr. Low brought home four specimens of this species. The 

 existence of a Porcupine in Borneo has been repeatedly mentioned, 

 for instance by Midler, Verhandl. Nat. Gesch. Ned. Overz. Bezitt. 

 p. 36 (under the erroneous name of Hystrix fasciculata), and by W. 

 Marshall, Proc. Zool. Soc. 1871, p. 235, who refers a very young 

 example in the Leyden Museum to Marsden's H. longicauda from 

 Sumatra. From the notes of the Dutch naturalists it is impossible to 

 decide whether the specimens examined by them belong to our species, 

 or whether a second species exists in the island, approaching in size, 

 and perhaps identical with, the Sumatran or Malaccan form. 



The Skull (figs. 1, l a , pp. 737-8) is distinguished by the short- 

 ness of the nasal bones, which are shorter than, or as long as, the 

 frontal suture. The anterior portion of the frontal region is not very 

 convex. Ascending ramus of the intermaxillary broad, about as 

 broad as one of the nasal bones. Infraorbital opening of compara- 

 tively moderate width. The palatal incision advancing forwards to 

 the front margin of the hinder molar. 



* On the inner side of one of the skins, in which the subcutaneous tissues 

 hare been cleared away, the arrangement of the large quills may be distinctly seen. 

 These quills are not uniformly distributed over tbe hinder half of the back, but 

 their roots are collected in bundles of five, six, or seven, the bundles having the 

 appearance of imbricated pectinated scales. The roots of the largest and 

 thickest quills occupy the middle of each scale or bundle. A similar arrange- 

 ment has been figured by P. Cuvier, Nouv. Ann. Mus. Paris, i. pi. xv. fig. 1. 



