Diameters of base of superior canine < 



172 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [VolYI. 



M. 



Elevation of occiput above foramen 036 



Widtb of chin at base 022 . 



Width, of chin at summit 028 



Depth of chin 040 



Depth of ramus at diastema 027 



Depth of ramus below last premolar 031 



Length of ramus ...» 157 



Elevation of condyle 033 



Elevation of coronoid process 071 



Length of superior canine 045 



antero-posterior 016 



transverse ^ 008 



Anteroposterior diameter at middle 010 



Distance from canine to third premolar 016 



Length of molars, including third premolar 045 



Length of base of third premolar 018 



Elevation of cusp of third premolar 013 



Length of base of sectorial 025 



Elevation of cusp of sectorial 015 



Width of tubercular 009 



Elevation of inferior canine 024 



Antero-posterior diameter of inferior canine at base 012 



Length of inferior diastema 022 



Length of inferior molar series 063 



Length of third premolar 0175 



Elevation of third premolar 0175 



Length of fourth premolar ,. . 020 



Elevation of fourth premolar 015 



Length of sectorial 025 



Elevation of median cusp of sectorial 016 



The characters of this species will be fully detailed in my final report 

 to Dr. Hayden, now passing through the press. 

 From the John Day Eiver, Oregon. 



I^IMKAVUS CONPEETUS Sp. nOV. 



This species is as yet represented by a mandibular ramus only. It is 

 one-third smaller than that of If. gompJiodus. 



The inferior border of the ramus is broken off, excepting for a space 

 below the diastema. The general form is narrow, as in N. gompJiodus, and 

 there is a projecting ledge along the inner base of the sectorial similar 

 to that seen in the latter species. The angle separating the side from 

 the front of the ramus is rather stronger than in If. gompJiodus, but there 

 is no indication of an inferior flare. The diastema is shorter than in the 

 typical species, its length equalling that of the base of the third (first) 

 premolar; in JV. gompJiodus it is half as long again. The symphysis is 

 correspondingly shorter, ceasing a little in advance of, and at the pos- 

 terior border of, the inferior canine tooth, while in N. gompJiodus it con- 

 tinues for one diameter of the canine behind its posterior border. 



The crown of the inferior canine tooth is directed backwards, and its 



