162 J. Wyman on Batrachian Reptiles from Ohio. 
and are provided with small single pointed teeth. That on the 
left side is sufficiently exposed to show that it is bifurcated 
towards the median line, as in Anoura. 
The palatine bones could not be traced. The atlas is in close 
apposition with the occiput so that the articulating surfaces are 
not visible, ‘The expansion of the atlas indicates however, that 
two condyles probably exist. No portions of the hyoid bone or 
of branchial arches were recognized. 
The vertebra are very imperfectly preserved, and are remark+ 
ably small in proportion to the size of the animal, and though 
several of them are destroyed, it is estimated that about twenty 
existed between the occiput and the pelvis. The transverse pro- 
cesses, if any exist are not visible, nor is there evidence of ribs. 
The Anoura are destitute of ribs, but these are replaced by very 
largely developed transverse processes. 
A slightly raised outline appears to be the only thing to i 
7 ie ‘ 
cate a scapular arch, but there are no details of structure. 
arm is better preserved, the humerus is much contracted in the — 
middle as in Batrachians generally; the radius and ulna are sep> ~ 
i we 
arate as in Urodels, and not united as in Anoura. In conse 
quence of the displacement or concealment of some of the 
phalanges the number of fingers could not be ascertained with 
precision. ‘There were certainly four, but a fifth is doubtful. It 
would be of great importance if a fossil should be detected with 
ve fingers, since no.existing Batrachians have more than four, 
While many of the supposed Batrachian footprints of the coal 
formations have five. ‘Ihe pelvis was destroyed, but traces of 
the right and left femur and of the right tibia remain. 
‘rom the above description it appears that this, one of the 
earliest created reptiles, combines in the same individual] some 
the characters of both of the two principal groups of Batra 
chians, viz: Urodels and Anoura. It agrees with the Jatter 
the shape of the head, the length of the lower jaws, and in the 
absence of ribs; and with the former in the regular conve* 
outer border of the lower jaw, and in the separation of the bones 
of the fore arm. 
f the anatomical characters of the species just described are 
b ; 
in any way remarkable, those of the two closely allied ones — 
Which remain to be noticed deviate still farther from wage!’ 
orms. One of them was discovered by Mr. Wheatley and thé — 
other by Dr. Newberry, in the same locality as the fossil already 
mentioned in the preceding pages. In both instances abou 
twelve or fifteen dorsal vertebree and the corresponding 11D 
€ only parts of the skeleton which are preserved; but as sat 
are only very slight differences in the successive vertebre 20 
ribs in each specimen, it is probable that several additional ones 
Were necessary to complete the series, and this would indica? 
& 
