19 



lorm of molar 3 aud the iimer surface of the uioUirs; but the speci- 

 men is smaller; premolar 4 differs iu width; aud molar 1 is shorter. 

 From Cope's descrlptiou I judge that the diastemata are shorter. 



There is a very large mental foramen, the posterior part of which 

 is beneath the anterior pai*t of premolar 1. It is very deep and oval 

 iu shape. There is also a small foramen below the liue of coutuct be- 

 tween premolar 4 and molar 1. About one third the distance from the 

 lower border of the jaw there is a depression extending beneatli the 

 'last three premolars aud the first molar. On the inuer side one extends 

 near the lower border under the molar series. 



MEASUREMENTS. 



M. 



Length of first diastema 0165 



Length of canine 008 



Width of canine 005 



Length of premolar 1 009 



Width of premolar 1 .0047 



Lengtli of second diastema 012 



Length of premolar 2 0124 



Width of premolar 2 006 



Jjeugth of premolar 3 015 



Width of premolar 3 0065 



Length of premolar 4 0177 



Width of premolar 4 009 



Space occupied by all the premolars 064 



Length of molai- 1 022 



Width of molar 1 014 



Length of molar 2 0263 



Width of molar 2 0153 



Length of molar 3 03r> 



Width of molar 3 014 



liPngth of last three premolars and the three molars 1236 



Depth of mandible below premolar 1 019 



Depth of mandible beneath premolar 2 02;j2 



"Depth of mandible beneath premolar 4 0254 



Depth of mandible beneath molar 1, anterior 026 



Depth of mandible beneath molar 3, front 0335 



Depth of mandible beneatli molar 3, back 046 



Pound iu the Loup Fork beds of the low'er Madison valley, Mon- 

 tana. 



Besides the camel remains above described there are many othei'S 

 ^hich will be described in a future paper. 



