300 THE WASATCU AND BKIDGER FAUN^. 



kindness of Professor Gnyot of Princeton College, who placed at my 

 disposal a specimen acqxiired by him for the beautiful museum under his 

 direction. 



The Princeton specimen agrees precisely witli my type in its corre- 

 sponding parts. It indicates the largest species of the genus, with the 

 possible exception of S. hians, and one of about the size of the red fox, or 

 ii little larger. 



The last superior molar, although narrower than the others, has a 

 triangular outline, the posterior angle being nearly right. Its anterior face is 

 straight. The crown bears three cusps, of which the interior is the most 

 robust, the median the smallest, and the exterior the most acute. The latter 

 is bounded by a low cutting edge on each side, extending from the base to 

 the anterior and posterior external angles. The penultimate superior molar 

 is subrectangular in outline, the right angle being external and anterior, 

 and the internal being obtusely rounded. The two external median char- 

 acteristic cusps are lenticular in section, and acute. At the inner and 

 marginal base of each is a low tubercle, the posterior one rudimental. 

 These inclose a basin with the larger inner cusp; round the base of the latter 

 is a distinct cingulum. The antepenultimate molar is lost. The preceding 

 one has a single large conical cusp and a posterior low cutting heel on the 

 external side ; also a low basal tubercle in front. The inner lobe of the 

 crown is rather large, and is contracted so as not to originate from the entire 

 inner side of the external portion. It supports an inner cusp only, and has 



no basal cingulum. 



Measurements of superior molars. 



M. 



LcDgtli of posterior four molars 041 



Length of the anti'rior, on base 010 



Wiiltli of the .intorior, on base 009 



Lengtli of penult iinati', on base ..1 000 



Width of penult iniato, on base Oil 



LenKth of last molar, on base 004 



Width of last molar, on base 009 



The mandibular ramus is rather compi'essed. The masseteric fossa 

 is well marked and is bounded by a strong ridge in fi'ont, but has no 

 distinct border below. The front of the base of the coronoid process is con- 

 cave, and its inner border is the most prominent. A short space separates 



