1912] Taylor: The Beaver of West Central California 169 



Measurements of Type. — Total length, 1171 mm., hind foot, 

 196, ear, 31 ; length scaled portion of tail, 320 ; basilar length of 

 Hensel, 126.3 ; zygomatic width, 103.4 ; mastoid width, 70.5 ; inter- 

 orbital constriction, 28.3; length of nasals, 54.4; width of nasals, 

 28.3 ; maxillary tooth-row, 34.5 ; height of foramen magnum, 10.1 ; 

 transverse width of foramen magnum, 18.1 ; greatest length of 

 mandible, angle to anterior surface alveolus of incisor, 111.3; 

 angle of mandible to coronoid, 62.3; ratio width of nasals to 

 basilar length, 22.4 per cent ; ratio maxillary tooth-row to basilar 

 length, 27.3 per cent. 



Remarks. — The golden beaver is a strongly marked species, 

 the characters of which are evident throughout our series of 

 specimens. At the present time the species is approaching 

 extinction, although the enforcement of the present protective 

 law may enable it to regain a foothold. 



Transmitted May 16, 1912. 



