APPENDIX. 
43 
below the groove. The dental foramen is large and is overhung by the 
thin incurved superior margin of the ramus. Its anterior margin termi- 
nates just behind the posterior part of the base of the coronoid process. 
The pores of the inner series are small and numerous ; the last one 
is a little anterior to the base of the coronoid process (34 lines). They 
are situated in a wide shallow groove which occupies a portion of the 
inner face of the ramus below the upper edge. Their interspaces are no- 
quite equal ; thus twenty lines separates two, and four are included in 
thirty-six lines. The foramina of the external series are more numerous 
than in any of the other species from the Miocene of our Eastern States. 
As in others the last pairs are less spaced than the anterior. In a space 
of six inches and twenty lines there are six foramina, the third from 
behind nine lines below the superior margin. Thirty-four lines sepa- 
rates the anterior pair ; twenty-two of the posterior. The last foramen is 
about a half inch anterior to the place of the last one of the inner side. 
Feet. Lines. 
Length of fragment, 2 42 
Depth just behind coronoid, 5G 
“ “ in front of “ GG 
“ at fourth inner foramen, G2 
Diameter “ “ “ 27 
This ramus chiefly resembles that of Eschr. cephalus from Maryland. 
It is less compressed, though crushed, and less attenuated on the upper 
margin near coronoid process ; the coronoid process considerably smaller 
Outer series of pores most numerous and extending farther back, inner 
in a marked groove which is wanting in E. cephalus. Outer wall of 
angular region more everted. Inferior wall of dental or mandibular canal 
descending from margin of foramen in E. cephalus, ascending in E. poly- 
porus. 
From the Miocene marl of Edgecombe county, N. C. Obtained by the 
writer under the auspices of the North Carolina State Geological Survey, 
under Prof. W. C. Kerr, director. 
Vertebrae which as to size and structure would accord with the present 
species, are not uncommon in the same deposit ; their description is 
reserved for a future occasion. 
