FACE 193 
parts. The last is small and consists of three divisions. The infraorbital canal is 
short. 
The body of the premaxilla is compressed dorso-ventrally, and contains three 
alveoli for the incisor teeth, which increase in size from first to third; it also com- 
pletes the medial wall of the large alveolus for the canine tooth. The foramen 
incisivum is very small except in large skulls. The interalveolar border is wide 
and very short. The nasal process is wide at its origin and tapers to a sharp point 
behind; the anterior part curves upward, backward, and a little inward, and forms 
the lateral margin of the osseous nasal aperture; the posterior part extends back- 
ward a long distance between the nasal bone and the maxilla. The palatine process 
turns upward and outward, forming with its fellow a wide groove for the septal 
cartilage; the posterior end is pointed and fits into a notch between the palatine 
Fie. 212.—Saairrat Section or Sxuut or Doc, WirHout MANDIBLE. 
A, A’, Basilar and squamous parts of occipital bone; B, B’, presphenoid and postsphenoid; C, C’, perpendicular 
and cribriform plates of ethmoid bone; D, parietal bone; E, frontal bone; F, pterygoid bone; G, G’, vertical and hori- 
zontal parts of palatine bone; H, vomer; J, premaxilla; J, nasal bone; K, dorsal turbinate bone; ZL, ventral turbinate 
bone; J, IJ, III, anterior, posterior and middle foss® of cranium; 1, occipital condyle; 2, opening of condyloid canal; 
3, canal for intertransverse sinus of dura mater; 4, internal occipital protuberance; 5, internal opening of temporal 
canal; 6, mastoid foramen; 7, floccular fossa; 8, meatus acusticus internus; 9, canal for trigeminal nerve; 10, internal 
carotid foramen; 11, 12, openings into petro-basilar canal; 13, foramen hypoglossi; 14, petrosal crest; 15, dorsum sell; 
16, hypophyseal or pituitary fossa; 17, optic foramen; 18, ethmoid foramen; 19, meatus naso-pharyngeus; 20, 21, 22, 
dorsal, middle, and ventral meatus nasi; 23, incisor teeth; 24, canine tooth; 25, premolar teeth; 26, molar teeth; 27, 
septum between frontal sinuses. 
processes of the maxille, and supports the end of the vomer. The palatine fissure 
is short but wide. 
The horizontal part of the palatine bone is extensive, forming about one-third 
of the hard palate. It presents a variable number of accessory palatine foramina. 
There is usually a pointed posterior nasal spine (Spina nasalis aboralis) at the end 
of the median suture. The palatine canal is sometimes formed entirely in this bone. 
The perpendicular part is even more extensive. Its lateral surface is chiefly free 
and forms most of the medial wall of the large pterygo-palatine fossa. The max- 
illary foramen is situated in a deep recess between this bone and the zygomatic 
process of the maxilla. Just above it there is commonly another foramen which 
opens into the nasal cavity. The posterior palatine and sphenopalatine foramina 
are situated further back and a little lower; the former is ventral to the latter. A 
horizontal plate extends from the nasal surface, meets that of the opposite bone, and 
completes the lamina transversalis spoken of in the description of the ethmoid bone. 
There is no palatine sinus. 
Boe peeryeoid bones are very wide and short. They form a considerable part 
