114 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 40. 



The specimens collected by Doctor Abbott are as follows: (a) Cat. 

 No. 153974, from the Kendawangan River, skull of a very young 

 male, having but two cheek-teeth in each half of the jaw. This 

 specimen has four upper incisors, a pair of slender rounded incisors 

 lying in front of and resting on the anterior face of the usual incisors. 

 They are scarcely large enough to be functional and remind one of 

 the hinder pair of incisors found in the Lagomorphs. (6) Cat. No. 

 145572, from the Semandang River, skull, without skin. The per- 

 manent molars are in place, but the milk molars have not yet been 

 shed, (c) Cat. No. 153737, skin and skull of an adult male from the 

 Kendawangan River. Its principal measurements are: Head and 

 body, from dried skin, 630 mm.; tail, from dried skin, 80; hind foot, 

 from dried skin, 85; weight, 22 pounds (10 kgs.); greatest length of 

 skull, 133; zygomatic width, 64; greatest length of nasals, 62. 



Porcupines seemed the usual inhabitants of caves [southeast Borneo], but except 

 the one Trichys none were caught. — W. L. A. 



AILURIN PLANICEPS (Vigors and Horsfield). 



1828. Fclis planiceps Vigors and Horsfield, Zool. Journ., vol. 3, p. 450, pi. 12. 



Type-locality, Sumatra. 

 1855. [Felis] (Ailuriii) [planiceps], Gervais, Hist. Nat. Mamm., vol. 2, p. 87. 



Five specimens of this cat were secured in southwestern Borneo. 

 For exact localities and measurements see table below. I have 

 carefully compared this series with an adult female from the Siak 

 River, Sumatra, and can find no characters by means of which the 

 Bornean specimens may be distinguished from the one from Sumatra. 



External and cranial measurements of Ailurin planiceps. 



1 Collector's measurements. 



