THE JAWS. 31 
each is produced backwardly into a 
curved lamellar process, the hamular 
process. The median space between 
the two pterygoid plates is known as 
the meso-pterygoid fossa. Lateral 
to the hamular process is a small 
space, the pterygoid fossa.’ 
i. The fpalatenes are two bones lying 
anterior to the pterygoids and articu- 
lating with the maxillz, the vomer, 
the orbital portions of the frontals, the 
lachrymals, the pre-sphenoid, orbito- 
sphenoids, and ali-sphenoids. Each 
palatine bone consists of two almost 
vertical plates, termed respectively 
the ascending and horizontal plates. 
The former constitutes the main por- 
tion of the bone, and is perforated by 
the posterior palatine foramen. 
ii. The szaxzlle form the greater part of 
the facial portion of the skull, and 
consist of two large irregular shaped 
bones. Posteriorly they articulate 
with the jugals and frontals; anteriorly, 
with the premaxilla. They carry the 
canine, premolar, and molar teeth. 
Above the first premolar is a large 
aperture, the infra-orbital foramen, 
? More distinctly seen in the Cat’s skull. 
