1916] Taylor: Two Nt w Aplodontias from North Ann rica 501 



superior check teeth, 19.5; distance between infraorbital foramina, 

 16.6; mandible, transversely across angular process, 25.2; greatest 

 length of mandible, 50.2. 



Remarks. — Aplodontia californica Columbiana is a strongly marked 

 form, being in general the largest species of mountain braver de- 

 scribed up to the present time. It averages above the maximum in 

 any other species or subspecies in length of nasals, zygomatic width, 

 and, with only two exceptions, in mastoid width. In total length 

 externally it averages decidedly above the maximum in any other race. 



Although it is true that so far as at present known there are 

 broad gaps between the geographic ranges of the three subspecies of 

 Aplodontia californica. and that no intergradation between them has 

 been demonstrated, nevertheless their mutual relationships as well 

 as their status with reference to other forms of the genus would seem 

 to be best shown by referring them all to this species. 



Transmuted February 28, 1916. 



