144 
MESODONTA. 
Measurements. 
Longtli of the calcanenm.... 
Width of the calcaueuui at astragalar facet.. 
Length of the astragalus . .. 
Length of the head and neck of the same. 
Width of the superior trochlear face of the same.. 
Length of a metacarpal bone... 
Proximal width of the same. 
Distal width of the same. 
Proximal depth of the unguis .. . 
Proximal width of the same. . 
M. 
0. 025 
0. 013 
0. 0105 
0. 007 
0. 007 
0. 031 
0. 0045 
0. 0075 
0. 0065 
0. 0050 
Tomitherium frugivorum, Cope. 
Plate xxxix, fig. 16. 
Pelycodus frtigivorus, Cope, System. Cat. Ext. VertebrataNew Mexico, U. S. Geog. Survs. 
W. of 100th M., 1875, p. 14. 
This species is known from a portion of the mandibular ramus, which 
A _ 
supports the last two molars. The size of the animal is about half that of 
the Pelycodus jarrovii. The last molar is oval and narrowed behind. The 
lateral margins are raised, inclosing a concavity. The border is thickened 
behind at the heel, and supports an inner anterior tubercle, which has a 
lesser one at its anterior base. There are two obtuse external tubercles. 
The penultimate molar is robust, and presents two inner and one outer ante¬ 
rior tubei’cles, the former connected with the latter by ridges. A stout 
posterior outer tubercle sends an oblique ridge to the anterior inner, while 
the tubercle at the posterior inner angle is insignificant. Enamel smooth, 
the external bases of the last two molars furnished with a cingulum. 
Measurements. 
Leugth of the penultimate molar. 0.0045 
Width of the same. 0. 0040 
Length of the last lower molar. 0. 0060 
Width of the same. 0. 0035 
Depth of the ramus at the penultimate molar. 0. 0090 
Width of the ramus at the same point. 0. 0040 
Tomitherium angulatum, Cope. 
Plate xxxix, fig. 15. 
Pelycodus angidatus, Cope, System. Cat. Extinct Vert. New Mexico, U. S. Geog. Survs. 
W. of 100th M., 1875, p. 14. 
This species was probably less than one-fourth the size of the last 
described, and is represented in our collections by but few specimens. 
