350 KANSAS UNIVERSITY SCIENCE BULLETIN. 
veloped ventral armature. The interorbital width is less than 
the transverse diameter of the orbit. 
The generic characters are found in the broad skull, the 
anisodont teeth, the median position of the orbits, the absence 
of a tympanic notch or posterior table to the skull, the presence 
of sclerotic plates, the great length of the fore limb and the 
well-developed ventral armature. 
Cephalerpeton ventriarmatum new species. 
(Plate 1, fig. 4; plate 7, fig. 2.) 
The remains on which the present discussion is based con- 
sist of an almost entire skull, twenty-six consecutive ver- 
tebrze, both fore limbs, twenty ribs preserved on the right side 
of the vertebral column, and a portion of the ventral armature. 
The skull is very broad posteriorly, its width being one- 
third greater than its length, with due allowance for crushing. 
A pineal foramen is not preserved. The sutures bounding the 
premaxillz, the maxille, the nasals, the prefrontals, the fron- 
tals, a portion of the parietals, the squamosal, the supratem- 
poral, the quadratojugal and the quadrate (?) are fairly well 
preserved. The arrangement of these elements can be dis- 
cerned by reference to figure 2, plate 7. The prefrontals are 
unusually large and are triangular in shape. The supratem- 
poral is also quite large. The epiotics and the supraoccipitals 
are not preserved. The surface of the skull bones is smooth 
and there is nowhere an indication of sculpture. 
Portions of four sclerotic plates are preserved in the right 
orbit. These measure one-half by three-quarters millimeters. 
The orbits are large and the interorbital space is less than the 
transverse diameter of the orbit. Thirteen teeth are pre- 
served on the left maxilla. The teeth are apparently pleuro- 
dont. They are short, sharply pointed, smooth and unequal. 
The first two left maxillary teeth from the anterior end are 
short. Then follows a tooth which is one-third longer than 
these two. The fourth tooth is somewhat shorter than the 
third. The fifth and sixth are still shorter and are practically 
equal. The seventh, eighth and ninth are all large. The 
ninth is the largest and the diameter of the base is greater 
than the third. The last four teeth are practically equal in 
size, though somewhat larger than the first two. 
The right mandible is preserved almost entire, though so 
badly eroded that little can be said of its structure. Im- 
pressions of twelve teeth are present on the mandible, and al! 
