EINAR LÖNNBERG, MAMMALS FROM ECUADOR. 13 



very deep valleys and precipitous ravines. It is therefore 

 rather natural that the isolation, which thus is brought 

 about, may result in the development of greater or smaller 

 differences in the characteristics of the animals, and that 

 these differences gradually get so fixed, that it can be spö- 

 ken about different races. Whether this is the case with the 

 Bears of Baeza compared with those of Azuay, I leave open 

 to question, until more material has been examined, although 

 I suppose that many modern mammalogists would think that 

 the former should be considered as a separate race. 



Odocoileus peruviaiius consiil n. subsp. 



A fine female specimen killed ^V^ 1^20 at Guamani on 

 the road to Papallacta, altitude 12000 feet. 



Cabrera has pointed out (Bol. Real Socied. Esp. Hist. 

 Nat. 1918), that this deer cannot be counted as a subspeoies 

 of O. virginianus (in consequence of the wanting metatar- 

 sal gland), and by this he objects to the proceeding of Ly- 

 dekker in Cat. of the Ungulate Mam. Brit. Mus. (Vol. IV 

 p. 175). In this opinion I have the pleasure of agreeing with 

 the first quoted author. He will, however, regard the Peruv- 

 ian form as a subspecies of O. gymnotis and, although it is 

 more related to this latter species than to the first mentioned, 

 my opinion is somewhat divergent, as I am inclined to con- 

 sider it sufficiently different to deserve the rank of a se- 

 parate species. Both are alike in the absence of the metatar- 

 sal gland, but the distinguishing characteristics are numerous, 

 and some of these have also been duly recorded by Cabrera. 

 The ears of O. gymnotis are (in accordance with the specific 

 name) »almost naked externally» (Lydekker); the pelage is 

 short and yellowish (or reddish) brown. O. peruvianus has 

 the ears well clothed with hair; the pelage is long and grizz- 

 led grey or greyish brown. The tail of the former is on the 

 upper surface »påle reddish brown» that of the latter »dark 

 brown» etc. In a key for the members of the gymnotis- 

 group, as Cabrera has defined it, he divides them into two 

 sub-groups, viz. those with short and reddish pelage, and 

 those with; thicker and greyish pelage. Only the latter are 

 of interest in this connection, and thej^ are (at present) 



