THE JAWS. 33 
palatine foramen. Their median 
portion is produced into a folded 
lamine, which lodges an accessory 
organ of smell known as Jacobson’s 
organ. 
v. The jugals or malars form the bound- 
aries of the orbit below and in front. 
Dorsally they articulate with the fron- 
tals and mawnilla. Posteriorly each 
bone is produced into a laterally 
compressed bar, forming part of the 
zygomatic arch. They support the 
zygomatic process of the squamosal 
on their free ends. 
b. The mandibular arch. 
1. The sguamosals are two large bones 
wedged in between the occipital and 
parietal segments. They form the 
hinder portion of the sides of the 
cranial cavity, and articulate with the 
parietals and frontals. 
From the ventral portion of each bone 
On 
a strong outwardly directed process 
passes forwards, the zygomatic pro- 
cess, and meets with the posterior 
portion of the jugal; the two forming 
the zygomatic arch. 
the under surface of the squamosal, 
and on the inner border of the base 
of the zygomatic process, is an oblong 
D 
