448 PROCEEDINGS OF THE ACADEMY OF [May, 



of the size aud shape of the crauium, foiaa is fai- more distinct 

 from viartes aud zihellina thau the latter are from auy American 

 form except caurina. It is interesting to note in this connection 

 that caurina resembles foina very closely in the small size and 

 shape of its audital bullse and the breadth aud flatness of the 

 brain -case, but in respect of the sagittal crest, frontal constriction 

 aud character of the teeth, caurina is closer to zibellina. Its 

 homologies connect it far more closely with the Eurasian than the 

 American type of marteu, aud would indicate a closer genesis from 

 the Old AVorld martens thau from tliose of the New World. As 

 it does uot appear to intergrade with the latter, I am induced to 

 consider it an isolated member of the martes- zibellina group. This 

 peculiarity is uot williout precedent in the Asiatic character of other 

 animals found in the habitat of caurina. 



Measurements. — Average of six adult males from Maine, Penn- 

 sylvania and the Adirondacks : Total length, 575 mm. ; tail 

 vertebrre, 175 mm.; hind foot, 82 mm. Skulls ditto: Basilar 

 length (from inferior lip of foramen magnum to posterior base of 

 upper median i.ucisors), 70.5 mm.; postorbital constriction, 

 16.0 mm. ; zygomatic expansion, 44 mm. 



Mustela americana brumalis (Bangs). Labrador Marten. 



189S. Mustela brumalis Bangs, American Natnralist, Vol. 32, p. 502. 



Type Locality. — Okak, Labrador. 



Faunal Distribution. — Humid coast region of northeastern 

 Labrador, Ungava bay to Straits of Belle Isle. lutergradiug 

 westwardly iuto actuosa, southwardly into americana. 



Description of Species. — Mr. Bangs' description of this race wa.? 

 based on three skulls, presumably of males, no skins being obtained. 

 Since then he has obtained skins, two of which, an adult male and 

 female, have been sent to me for examination. The character of 

 the skull of brumalis as compared with that of americana from 

 Maine is certainly conspicuous for greater size, but the relative 

 liroportions when compared with specimens from Maine of same age 

 and sex are not so marked as described by Bangs. I note that the 

 skulls of brumalis are surprisingly identical in size and proportions 

 with those of actuosa from the jMackenzie river district and Alaska, 

 as shown by the fine series loaned by the U. S. National JMuseum. 

 This is referred to by Osgood in his description of actuosa, but the 



