978 * THE WHITE EIVEE FAUNA. 



crown. It is present on both sides of the specimen. The enamel of all 

 the teeth is smooth. No cingula. 



Measurements. 



M. 



Length of skull on base 140 



Width of skull, measured below Ill 



Length of palate 060 



Width of palate between posterior angles of sectorials 062 



Width of iialate between canines 026 



Length of skull to front of orbits (axial) 050 



Vertical diameter of orbit 031 



Interorbital width (least; 045 



Elevation of inion from foramen magnum 032 



Length of inferior molar series 050 



Length of inferior sectorial 018 



Length of base of inferior first premolar 055 



Depth of ramus at sectorial 016 



Depth of ramus at first premolar 021 



Depth of ramus at flange 026 



From the Miocene beds of John Day River, Oregon. Found by 

 J. L. Wortman. 



This species was as large as the fully grown Canada lynx. Although 

 of an inferior position in the system of Carnivora, its powers of destruction 

 must have excelled those of the catamount. While the skull is generally 

 less robust, its sectorial teeth are not smaller nor less effective than those of 

 that animal, and the canines far excel those of the li^ang sjjecies as instru- 

 ments for cutting their prey. 



DiNiCTis FELiNA Leidy. 



Proceedings Academy Philadelphia, 1854, 197; 1S56, 91; 1857, 90. Extinct Mammalia Dakota and 



Nebraska, 1869, p. 64 : Plate V, figs. 1-4. 



This species, whose dental and cranial characters have been described 

 by Leidy, is known from a number of crania and jaws. The former differ 

 in their ^proportions from those of the D. cyclops, having a relatively longer 

 cerebral and shorter facial part of the skull. The anterior premolar teeth, 

 especially in the upper jaw, were stronger than those of D. cyclops. 



I introduce the D. felina here for the purjwse of mentioning its geo- 

 graphical range. Since the original specimens were brought from Northern 

 Nebraska by Dr. Hayden, I have obtained a mandible from Northeastern 

 Oolorado, and the Princeton Scientific Exploring Expedition procured part 



