492 Mr. 0. Thomas on 



coloration as in the Cumana subspecies flavescens— that is to 

 pay, dark punctulated olive-brown, the limbs darkened ter- 

 minally to black, and the long hairs of the rump rich orange 

 (near "orange-buff"). Chin dull whitish; chest and belly 

 brown, the latter with a median line of dull yellowish. 



Skull large, long and narrow, especially elongated in the 

 muzzle. Nasals narrow, evenly rounded into a uniform semi- 

 circular curve behind, surpassing by 6 - 7 mm. the pre- 

 maxillary processes, wliich are of fair normal breadth. 

 Teeth stout and strong, conspicuously larger than in 

 D. ruhrata. 



Dimensions of the type (measured in the flesh) : — 



Head and body 502 millim. ; tail 41 ; hind foot, s. u. 115, 

 c.u. 128; ear 47. 



Skull : greatest length 114 ; basilar length (c) 86 ; zygo- 

 matic breadth 49 ; nasals 44'5 X 18 ; interorbital breadth 

 31-5; palate length 45; diastema 30; length of upper 

 tooth series {p^ up and in wear) 20-2. 



Huh. Caicara, E-iver Orinoco. 



Type. Old female. B. M. no. [8. 12. 1. 21. Original 

 number 11250. Collected 22nd October, 189S, by Mr. G. K. 

 Cherrie. 



Native name " Picure " or *^ Acure." — G. K. C. 



Exactly as in the case of the Philander Opossums, a form 

 of the small species inhabiting Trinidad {D. ruhrata) occurs 

 in Cumand (subsp. Jlavescens) ,^ while the animal found 

 further east on the Orinoco and in Cayenne is conspicuously 

 larger than either. But in the present case the Cayenne 

 form shows certain differences from the Orinoco one, and may 

 itself be subspecifically separated as 



Dasyprocta lucifer cayennce, subsp. n. 



General colour as in lucifer, but the nape and fore back 

 nearly uniform brown, scarcely punctulated at alh 



Skull readily distinguishable from that of lucifer, with 

 which (allowing for age) it agrees in size, by the very 

 different shape of the nasals, which are broad, nearly squarely 

 truncated behind, and scarcely siu-passing the premaxillary 

 processes ; these latter run to a fine point and are unusually 

 narrow, being only 2-2 millim. broad 8 millim. from their 

 tips. 



Dimensions of the type (measured in the flesh) : — 



Head and body 500 millim. ; tail 35 ; hind foot, s. u. 119, 

 c. u. 136 ; ear 42. 



