1876. I DR. A. GUNTHER ON BORNEAN MAMMALS. 427 



The foramen in the zygomatic arch is a narrow elongate slit. The 

 measurements of the four posterior molar teeth are as follows : — 



Length. Width. 



milhm. niillim. 



a. Molar 17 17 



I. Molar 2-5 2-5 



c. Molar 23 2-5 



d. Molar 1-4 2-0 



Several specimens of this species have been sent by Mr. Low from 

 the mainland of Borneo, opposite Labuan. 



6. Tupaia murina (Mull. & Schleg.) = 7\ frenata, Grav, Ann. 

 & Mag. Nat. Hist. 1860, vi. p. 217- 



II. The greater part of the hairs on the hind part of the bach and 

 tail are of a uniform black, brown, or red colour. 



A. Large species. 



7. Tupaia tana (Raffl.). 



This species is subject to considerable variation of colour, unac- 

 companied by any structural modification of the skull or dentition. 

 The second molar has sometimes a well-developed inner tubercle at the 

 base of the cusp ; but in other specimens showing exactly the same 

 coloration this tubercle is absent. I therefore must confirm Sehlegel's 

 opinion that Tupaia speciosa of Wagner is not specifically distinct 

 from T. tana. The following varieties may be distinguished: — 



a. Var. tana. Tail black above, basal half of each hair rusty- 

 brown, lower part of the tail dark brown. Sumatra ; 1 Borneo. 



b. Var. speciosa. Tail brownish red above, bright rusty-red 

 below. Sarawak, Pontianak. 



c. Var. chrysura (Plate XXXVI.). Tail golden yellow, with a 

 reddish tinge. Mainland of Borneo, opposite to Labuan. 



8. Tupaia nicobarica, Zelebor, Novara-Reise, Saugeth. p. 17, 

 Taf. 1 & 2. 



Nicobars (a desideratum in the British-Museum collection). 



B. Small species. 



9. Tupaia splendidula (Gray). 



Having extracted the skull from the typical specimen, I have con- 

 vinced myself that this specimen is perfectly adult. 



Paradoxurus philippensis (Temm.). 



An adult example sent by Mr. Low from the mainland of Borneo, 

 opposite Labuan, agrees in every respect with specimens collected 

 by Dr. A. B. Meyer in Luzon. 



VlVERRA TANGALUNGA, 



The Civet Cat inhabiting Borneo is the Viverra tangalunga of 



Grav. 



