254 EDwın CHAPIN STARKS, 
No basisphenoid, orbitosphenoids, opisthoties, or supraorbitals 
are present. 
Lateral bones of head. 
The head of the hyomandibular is undivided. It articulates to 
the extreme outer edge of the pterotic in front of the outer angle, 
anteriorly overlying the cartilaginous area between the pterotic, the 
prootic, and the sphenotie, without, as is usual, articulating with 
the two latter bones. A long strong process runs back from the 
hyomandibular to support the opercle, leaving a large open passage 
between it and the upper end of the preopercle. Anteriorly the 
hyomandibular sends a short stout process to the symplectie, and a 
long more slender one to the metapterygoid. 
There is an area of cartilage between the symplectic and the 
hyomandibular process. The former bone is very large and extends 
some distance along the inner edge of the quadrate. 
The metapterygoid is unusually thick for that bone, and is 
triangular in shape. Cartilage separates it rather widely from the 
broad thick quadrate. 
Above the quadrate and the anterior end of the meta- 
pterygoid is the thin mesopterygoid extending a little anterior to the 
quadrate. 
There is no pterygoid, but the end of the palatine is attached 
directly and rather narrowly to the quadrate and the mesopterygoid, 
the latter bone extending slightly over it. The palatine is normal 
in shape, bearing teeth along nearly its entire lower edge, and 
has a process at its anterior end which hooks slightly over the 
maxillary. 
The elements of the mandible are normal in arrangement. There 
is no space between the upper edge of the articular and the dentary, 
The angular is present and well developed. 
The opereular bones are all present. A very wide preopercle 
almost entirely covers the long slender interoperele, the anterior 
end of which is attached by a long ligament to the angular. The 
preoperele does not bear an open neural channel as usual, but a 
closed tunnel, open only at each end, curves nearly vertically down- 
ward from the tip of its upper end to its lower edge. 
“The premaxilla while lying closely appressed to the maxilla, 
is readily separated from it, the two being in no sence ‘coalescent’” 
