458 PROCEEDINGS OF THE ACADEMY OF [May, 



jtiw, readies up along sides of neck to and including inner 

 base of forelegs, and stretches by spotted interruptions almost to 

 vent, the main body of color terminating on lower breast. The 

 rich coloring and great size of this pattern seem constant in a 

 series of Cascade mountain skins before me. A tendency to scat- 

 tered long silvery hairs through the upper pelage is noticeable as 

 contrasted with americana. This feature is also in the direction of 

 zibellina. 



In external character the relative length of the tail of caurina 

 is greater than in any other form of American marten except 

 orir/enes. This in a comparison made with my series of Lake 

 Kichelos skins, which were measured in the flesh by collector, Mr. 

 Allan Rupert. It appears likely, howev^er, that his measurements 

 included part of the brush of tail, as the measurement of the dry 

 specimens now seems to indicate. Allowing for this, however, the 

 caurina specimens indicate a long-tailed marten, as the average 

 below given of six old males indicates. See further discussion of 

 cranial characters under 31. americana typicus. 



MeasuremenU. — Total length, 675 mm. ; tail, 270 mm. ; hind- 

 foot, 90 mm. Deducting from this 50 mm. , the length of the body 

 of tail pencil, leaves the total length 625 mm. , and the tail vertebrae 

 220 mm., Avhich is much greater relatively and absolutely than in 

 other American martens whose size exceeds caurina. The length of 

 the body, skull and hind foot are nearly identical with the medium - 

 sized martens of southern Canada. It is to be regretted that Dr. 

 Merriam gave no body measurements of his types of caurina. 

 Skull measurements (average of six old males) : Basilar length, 

 74 mm.; zygomatic expansion, 51; iuterorbital constriction, 15. 

 For relative dimensions of teeth, see above under description of 

 species. 



Mustela caurina origenes- subsp. nov. Rocky Mouutain Marteu. 



Type, No. 112,170, young adult 9, collection of U. S. National 

 Museum, from " Marvine Mountain" (Garfield county?), Colo. 

 Collected by Ernest T. Seton (E. Seton Thompson), September 

 16, 1901. 



Faunal Distribution. — Southern Rocky mouutain region; higher 

 ranges of New Mexico (?) northward; probably replaced in the 



'^ From the Greek, meaning " a mountain race." 



