CORYPIIODON. 
225 
Length of the third molar. .... 
Width of the same. 
J)iameter of the base of the crown of the canine | posterior 
{ transverse . 
Length of the crown (worn). . . 
Width of the crown of the second incisor.. 
Elevation of the same (unworn). 
Width of the crown of the second lower incisor.. ... 
Elevation of the crown of the second lower incisor when unworn 
Length of the crown of the interior incisor. 
WiiUb at tlie .. 
Length of the diastema .. 
Length of the six anterior molars.. . 
Length of the premolars. ....... 
Length of the penultimate molar. 
Width of the same. 
A considerable number of loose bones were found on the ground 
among the rocks containing the remains described, but I cannot refer them 
to the same animal with certainty. 
Coryphodon simus, Cope. 
Bailmodon simvs, Cope, Report Vert. Foss. New Mexico, U. S. Geog. Survs. W. of 
100th M,, 1874, p. 8. 
The specimen which first announced the existence of this Ungulate was 
found on a slope of a bad-land bluff. It consists of a fragmentary cranium, 
of Avhich a considerable portion was discovered in place, but so cracked as 
to be only removable piece by piece. The reconstruction has given one 
premaxillary bone, with the apex missing; the left maxillary, supporting 
six molars, four in good condition ; the right maxillary, supporting- one 
molar; both mandibular rami, with all the molars excepting the first and 
second on one side, with a part of the s3uuphysis; a superior canine, 
incisors and fragments of superior molars loose, and numerous portions of 
the skull, including the zA^gomata, etc. 
The teeth of this specimen indicate a smaller animal than those which 
represent some of the other species, being less than those of the type of 
C elepliantojjus. The inferior molars, especially the posterior, are elongate, 
as compared with their width, and have a Avell-marked heel. The superior 
canine is small, and with trihedral crown. 
15 G R 
0. (»3t 
0. 040 
0. O-T) 
0. (130 
0. 033 
0. 018 
0.018 
0. 0110 
0. 018 
0. 053 
0. 025 
0. 028 
0. 034 
0. 122 
0.004 
0. 034 
0. 024 
