EXTINCT AMPHIBIA OF NORTH AMERICA 57 
posterior border lies in front of the line dividing the skull transversely 
into equal parts. The in- 
terorbital space is greater 
than the diameter of the 
orbit. Impressions of teeth 
are preserved on the pre- 
maxillae and maxillae (Fig. 
1©)pee here: ate eight: of 
them in a distance of three 
millimeters. The teeth 
appear to be mere blunt 
denticles and were possibly 
pleurodont. 
mie evelements) ot the 
cranium are very poorly 
preserved. It has been 
impossible to determine all 
of the sutures. The bones 
of the premaxillary region 
have been destroyed but the 
arrangement of them was 
probably not far different 
from that which obtains in 
other members of the genus. 
The posterior boundaries of 
the nasals are preserved and 
prove this element to have 
had an obtuse _ posterior 
border al hie su tun els 
bounding the frontals are 
clear and show that they 
were small and that they 
formed a part of the inner 
boundary of the orbits. 
The parietal is recognized 
as a large element, appar- 
ently the largest in the 
AR 
tr 
Mine 4 
ins | 
i. 
of 
# 
x 
4 
DG 
‘ 
y 
it 
- xt 
hid 
V4 
af ios 
eer: 
4 ey pa 
ig’t ih’ 
Fic. ro—The skeleton of Tuditanus minimus 
as it is preserved on the black slate. The letter- 
ing as in figure 5. X2. 
