ZOOLOGY. 209 
laminze. I can find no suture separating these plates from the 
squamosal above, and am therefore disposed to doubt whether 
they do not belong to these rather than to the parietals. 
The ? epiotic is a subovate bone with truncate extremities, which 
has its long axis directed upwards and inwards. It is in contact 
with the parietal and the descending anterior plate of the squamo- 
sal, and inferiorly with the bone described in the next paragraph 
as prodtic. It occupies a position similar to that seen in Sphenodon, 
excepting that it does not appear to extend to the quadratum. It 
might be questioned whether this bone is not really the prodtic. 
The element below and anterior to it (fig. 5, Pro) is emarginated 
for the exit of the fifth nerve (V); and though I cannot find its 
inferior borders, and the portion behind the above foramen is nar- 
row, it appears to me to answer more nearly to the prodtic of 
Fig. 6.— (Cranium from behind.) 
Lacertilia than to an alisphenoid, which it would otherwise be. 
This is the more probable, in view of the fact that the supposed 
epiotic has its counterpart in Sphenodon, in which case this must 
be prodtic. 
The fenestra ovale (fig. 6, FO) is not readily discovered, but 
appears to be represented by a rather small oval foramen-like emar- 
gination of the exoccipital. It is situated just within the quadrate 
plate of the squamosal, and beneath the zygomatic process. I find 
no stapes. If it existed, it extended outwards beneath the over- 
hanging margin of the squamosal, on the plane of the superior 
margin of the os quadratum. 
A.A. A.S. VOL. XIX. 27 
