48 ARKIV FÖR ZOOLOGI. BAND 14. NIO 4. 



Coelogeiiys taczanowskii Stolzmann. 



1 male skull without skin from below Nanegal about 

 4,000 feet, August 1910. 



This skull agrees very olosely with Stolzmann's figures, 

 and its dimensions with the by him recorded measurements, 

 with the exception that the interorbital breadth is larger 

 (39 mm). There is, however, no doubt that this skull must 

 be referred to Taczanowskis Paca. This species was stated 

 by the describer to live at an altitude of 6 — 10,000 feet, and 

 it is therefore of interest to have this specimen from such 

 a low altitude. But Allen^ has recorded 2 specimens, which 

 he refers to this species from Barbacoas, southwestern Co- 

 lombia, at an altitude of only 75 feet, so that it does not 

 appear to be restricted only to great altitudes. 



Coelogenys taczanowskii andina Lönnb. 



1 c^ ^V^ 1914, Pichincha, 13—14,000 feet. 1 $ juv. ^5 

 1914 ibidem. Native name »Chacha ouy». 



I referred this Paca originally as a subspecies to Coelo- 

 genys sierrae Thomas, but when I have now received more 

 material of both forms, I find that it really has more affi- 

 nity to C. taczanowskii. It resembles the latter f. i. with 

 regard to the shape of the diastema portion of the palate 

 supraorbital grooves (c. f. above) etc. 



The present adult specimen is a little more robust than 

 the type specimen, but the characteristics by which it differs 

 from C. taczanowskii and which were recorded in the original 

 description hold good even for this specimen which like the 

 original type is an adult male. 



The sole-pads of these specimens as well as those of the 

 type are granulate and rather well defined. The same ap- 

 pears also to be the case with specimens of C. sierrae so 

 that there appears hardly to be any difference in this respect 

 between the mountain Pacas and those from the low country. 

 This is evidently the extreme alpine race of Taczanowskis 

 Paca, while C. sierrae Thomas has a different origin. 



' Bull. Amer. Mus. Nat. Hist. 1916. Vol. XXXV, p. 205. 



