THE DOGS SKUEL. 
ting the third division of the trigem- 
inal nerve (vth), and, anterior to this, 
the foramen rotundum, a much 
smaller and more circular aperture, 
through which the second division of 
the trigeminal nerve passes. Between 
the ali-sphenoids and orbito-sphenoids, 
is a large oval foramen the foramen 
lacerum anterius, or sphenoidal 
fissure; through it the motor-occull 
(iii) pathetic (iv) and abducens (v1) 
nerves find exit. 
iii. The zuter-parzetal is a small narrow 
median bone, anchylosed with the su- 
pra-occipital, and extending for some 
distance between the parietals. 
iv. The parzeta/s form the greater portion 
of the upper and lateral surface of 
the cranium ; they articulate with each 
other in the mid-dorsal line, forming 
the sagittal suture; the point of su- 
ture forms a raised crest, the sagittal 
erest, which divides in the anterior 
portion of the parietals and extends 
anteriorly on either side of the frontals, 
as far as the post-orbital process of 
these bones; it serves for the attach- 
ment of the temporal muscle, which 
passes through the space bounded by 
the zygoma, known as the temporal 
