142 i\rr. O. Tliomns on 



brown, tlie tuft of spines near tlieir outer base wliitish basally, 

 then dark, witli a subterniinal ring of white and an inci n- 

 s))icuoiis black tip. Hands and feet uniformly dark brown 

 above. Proximal two thirds of tail above clothed with 

 bicolor blackii^h-tipped spines like the rump, its sides and 

 under surface bristly, more uniformly blackish, but mixed 

 with a few inconspicuous white bristles; end of tail brown on 

 sides and below, naked above. 



Skull rather smaller than that of C. bicolor ; muzzle 

 shorter and less swollen ; brain-case smooth and compara- 

 tively unridged ; bullae smaller ; palatal foramina larger, 

 and the fossa in which they lie more open. Premolar markedly 

 larger than tlie molars. 



Dimensions of the type (an old female, measured in the 

 flesh) :— 



Head and body 425 millim, ; tail 335 ; hind foot, s. u. Gi^, 

 c. u. 79 J ear 28. 



Skull : greatest length to^gnathion 92, to tij) of nasals 82 ; 

 basilar length 76 ; greatest breadth 51 ; nasals 27 X 19 ; inter- 

 orbital breadth 32'3; least breadth above meatus 31*5; 

 ])alate length 39; diastema 23; length of buUce 20; length 

 of ujiper tooth-series 20. 



IJab. and type as above. 



"Native names 'Chapisevada,' 'Puerco espina.'" — P. 0. S. 



This tine porcupine is clearly the representative in Bolivia 

 of the Peruvian C. li'color, from which it differs by its 

 smaller size and the orange speckling of the head and 

 shoulders. 



These two species, with the still smaller and more speckled 

 C. ^w/c/a/a of Ecuador *, form a natural group intermediate 

 between the " Synetheres " and " Sjjhiggurus^' sections of the 

 genus, agreeing in their hairlessness and the spinous con- 

 dition of their bellies with the former, but in their little 

 inflated skull with the latter. 



28. Lagidium peruanum, Mey. 



? . Paratani, 2600 m. 9th April, 1901. 

 Native name " Biscacho." 



29. Dasyprocta sp. 



Immature J & ? . Charuf)laya, 1350 m. June 1901. 

 These two specimens are strikingly different from each 



♦ AuD. & Mag. Nat. Hist. (7) iv. p. 283 (1899). 



