CKEODONTA. 
105 
Measurements. 
Length of the inferior molar series...... 
Length of the inferior premolar series. 
Depth of the ramus at the third premolar_... , 
Width of the ramus below the third premolar.... 
Depth of the ramus at the last molar. 
Thickness of the coronoid process at the base.... 
Length of the four po-^terior superior molars. 
Length of the first true molar. . 
Width of the first true molar. 
Length of the second true molar. 
Width of the third (transverse) molar. 
Length of the five anterior inferior molars. 
Long diameter of the base of the inferior canine.. 
M 
0. 0725 
0. 0430 
0. 0275 
0.0120 
0.0335 
0. 0120 
0. 055 
O.OIG 
0, 015 
0.016 
0. 018 
0.054 
0.015 
Portions of both maxillary bones, with teeth of a third individual, add 
some characters. From it we learn that the first superior premolar is one- 
rooted; that the second has a short posterior basal tubercle and a weak 
basal cingulum in front. 
A third individual is represented by a portion of the ramus mandibuli 
supporting the premolars, by the first true molar separate, and by other 
pieces. This specimen I formerly alluded to as belonging to the 0. morsitans 
(Report on Vert. Foss. New Mexico, p. 13). The first, single-rooted pre¬ 
molar is absent, perhaps abnormally, as there are no other marked characters. 
The posterior mental foramen is below the anterior part of the fourth pre¬ 
molar. Depth of ramus at posterior border of symphysis, 0“.027; thick¬ 
ness at the same point, 0“.015; depth of ramus at posterior border of fourth 
premolar, 0™.028. 
A fifth individual is represented by a portion of the mandible support¬ 
ing two molars. 
Oxyaena forcipata. Cope. 
Plate XXXV, figs. 7-12; Plate xxxvi; Plate xxxvii, figs. 1-5. 
Keport Vert. Foss. New Mexico, IT. S. Geog. Survs. W. of lOOth M., 1874, p. 12; Id. 
Ann. Report U. S. Geog. Survs. W. of lOOtU M.; 1874, p. 124. 
This, the largest species of the genus, is represented in five individuals, 
chiefly by cranial fragments. The type of my first description embraces, 
among other parts, both mandibular rami with most of the teeth, with some 
of those of the maxillary series. 
