STEWART: NOTES ON SAURODON AND ALLIED SPECIES. ISI 
The frontals are broad, flat bones extending from the ethmoid, 
with which they are united by a squamose suture, back to the 
parietals. Laterally, they form the superior borders of the orbits. 
In the median line they are separated by a suture. The bones are 
probably in contact with the supraoccipital, but, owing to the 
crushed condition of this region, this point can not be definitely 
determined. 
The parietals are small elements, in contact with the pterotics 
and the epiotics (?) posteriorly. The epiotics are probably coéssi- 
fied with the parietals; at the point where the suture should be | 
there isa crack, but the edges at no point show signs of sutural 
union with the opposite portion. if this be the case, the parietals 
nearly or quite meet in the median line. If the bones are not co- 
éssified, the parietals are separated by a long slender anterior pro- 
cess of the epiotic. There seems to be a faint suture between the 
parietals and the sphenotic. The epiotic process of the parietal* 
does not seem to be produced as far posteriorly in this species as 
in SS. intermedius, described and figured by Newton.+ They are 
heavy projections of bone and form the inner lateral processes of 
the skull as in other members of the Sauwrodontide. Mr. Newtont 
seems somewhat in doubt about the bones in this region, and is 
unwilling to accept the bone called parietal by Cope, stating for his 
reason that the lines indicative of the direction of growth were 
from the extreme posterior angle of the skull instead of from the 
anterior portion as we would expect if this bone were the parietal. 
In a skull of J/chthyodectes, before me, there is a distinct suture 
between the parietal and epiotic, and in this specimen the lines, 
- indicating growth, radiate from the posterior portion of the bone 
as in Saurodon intermedius and the specimen under consideration. 
I also find the same condition in skulls of Xzphactinus which I have 
examined. 
The pterotics are large bones. The line of separation between 
them and the parietal can not be traced throughout, but this is 
probably due to the crushed condition of this bone. The radiating 
lines pass upward and backward instead of upward and forward as 
in S. zztermedius Newton. It seems to be very dense in structure. 
The supraoccipital is very much crushed and broken away, but 
enough remains to show that the bone was raised into quite a 
prominent crest It extends backward beyond the points of the 
*[ think it should be called thus until the presence or absence of the suture between 
this béne and the parietal is definitely determined. 
tl e., p. 444, pl. xxxiv. 
¥L¢c., p. 444-445. 
