FACE 171 
from before backward. As in the ox, a narrow space separates the right and left 
bones and takes the place of the foramen incisivum. The palatine process is long 
and narrow. The nasal process is very extensive and is somewhat rhomboid in 
outline. Its dorsal border forms a very long suture with the nasal bone, and the 
ventral articulates to about the same extent with the maxilla. The palatine fissure 
is relatively wide. 
The horizontal part of the palatine bone forms a fourth to a fifth of the length of 
the palate; its palatine surface is triangular, the apex being anterior; its nasal 
surface is deeply grooved and smooth. A pterygoid process (Processus pyramidalis 
of man) projects backward and downward, and its thick rounded end is received 
between the pterygoid process of the sphenoid and the pterygoid bone. The 
perpendicular part is largely overlapped laterally by the maxilla and concurs in 
Fre. 180.—Sacirrat Section or Skutu or Pie, wirHouT MANDIBLE. 
A, A’, Basilar and squamous parts of occipital bone; B, body, B’, temporal wing, B”, orbital wing, of sphenoid 
bone; C, parietal bone; D, D’, internal and external plates of frontal bone; EZ, E’, cribriform and perpendicular plates 
of ethmoid bone; F, pterygoid bone; G, G’, perpendicular and horizontal parts of palatine bone; H, palatine process of 
maxilla; J, vomer; J, nasal bone; K, body of premaxilla; ZL, dorsal turbinate bone; M, ventral turbinate bone; 
T, II, 1/1, fosse cranii; 1, hypoglossal foramen; 2, foramen lacerum posterius; 3, meatus acusticus internus; 4, fora- 
men lacerum anterius; 5, hypophyseal or pituitary fossa; 6, foramen orbito-rotundum; 7, lateral crest between cerebral 
and cerebellar parts of cranial cavity; 8, optic foramen; 9, ethmoidal foramen; 10, frontal sinus; 11, meatus naso- 
pharyngeus; 12, 13, 14, dorsal, middle, and ventral nasal meatuses; 15, incisor teeth; 16, canine tooth; 17, premolar 
teeth; 18, molar teeth; 19, paramastoid process; 20, bulla os 
| forming part of the palatine canal. The two plates separate dorsally and inclose 
an air-cayvity which opens into an ethmoidal meatus. The inner plate curves 
inward and unites with the vomer and ethmoid to form a horizontal plate, the 
lamina transversalis, which divides the posterior part of the nasal cavity into a 
dorsal olfactory part and a ventral respiratory part. 
The pterygoid bone is nearly vertical in direction, and is narrow in its middle, 
wide at each end. The lateral surface is free below and forms the medial wall of 
the pterygoid fossa. The ventral end is notched and forms a distinct hamulus. 
The nasal bone is very long and its width is almost uniform, except at the 
anterior end, which is pointed and reaches almost as far forward as the premaxilla. 
‘The facial surface is flattened from side to side. - In profile it is nearly straight in 
some subjects, variably concave in others. The lateral border is free to a small 
extent in front only; otherwise it is firmly connected with the premaxilla and 
