81 



Fig. 32. 



id protuoeranco replaces the mastoid pi - I 'lie ma-toid en -t i-. a- in tin- < >\. 



confoiinile.l with tlie Miperior root of the /ygomat 



The projection formed by the mastoid protulieran .-.- j., enormous. The subtilifonn 

 ia i- little marked, ami there is no hyoideal prolongation or parieto-temporal can d. 

 '. SttfH'i-mnjriUnrij ln>iif. In the 1'ig. th>- ex- 

 ternal surface of this Uine is hollowed in it- middle, 

 anil presents in front a voluminous relief formed 

 by the alveolus of the canine tooth. The cavity 

 i> entirely forme. I in the sii]>criimxilla. There is 

 ici alveolar tuberosity, and the interdental space 

 j short, while the cavity for the sinus is little 

 ilevi IOJM- 1. Thi- lower orifice of the (mlatine canal 

 i pierced in the substance of the super- 

 maxilla. 



7. I'l-fnuifiUnri/ bone. The external process of 

 the premaxillary bone is very long and wide at its 



tnd consolidated with the nasal bone for 

 alnmt the upper two-thirds of its length. There 

 is no incisive foramen or cavity for the tusk. The 

 inci.Mve openings are oval. 



8. Palate bone. The palatine portion of the ex- 

 ternal face is more developed than in the Ox, but 

 the orbital jxirtion is very limited. The palatine 

 Te-t j- rplac.-d by a tuberosity, against which 

 rests, outwardly, the snbsphenoidal process, and 

 inwardly, the pterygoid bone. The union of these 

 three parts constitutes, on the posterior surface of 

 the head, a thick and very remarkable trifid pro- 

 jection or mamelon. 



9. Fterygoid bone. See the description of the 

 palate l>onc. 



10. /i/ijoinatic bone. The summit of this bone 

 in the Pig is flattened on each side, and divided 

 into two blanches, between which is wedged the 

 summit of the zygomatic process; the anterior 

 branch is very .-hort, and does not join the frontal 

 bone, 



1 1 . Lachrymal bone. In the Pig there are ob- 

 .-erved a lachrymal fossa and two lachrymal canals, 

 which are pierced outside the orbital cavity, and 

 soon coalesce in the substance of the bone to const i- 

 tnte a -in_'le canal. The fossa is very deep. 



1 \a*al ban**. These bones are long and nar- 

 i-i'l traversed on their external face by the 

 that descends from the superciliary foraim n. 

 The nasal prolongation is short 



i;{. Turbinated bones. The same arrangement 

 as in the Sheep and Goat, except that they are 

 much longer and less fragile. 



14. Inferior Maxilla. A straight line leading 

 from the greater axis of the alveoli of the molar would 

 not traverse the posterior border of the maxillary 

 branch, s ; tin- bottom of these alveoli corresponds 

 to the relief on the inner fa' e. The condyle is 

 compre.-s d on both .-ides, and elongated from mfcn 

 to I., hind; while the coronoid process is short and 

 wide. There is no neck; the interdental spaces 

 ry short : and the inaxillo-dental canal opens 

 interiorly by multiple orifices. 



l"i. lljnid boite. The body is voluminous and 

 deprived of an appendix; the small branches are 



short and consolidated with the body ; while the large branches, curved like an 8, are very 

 thin, and are united to the small branches and the temporal bone no longer by tihro- 



curtila;:e. but by veritable Yellow elastic ligaments. 



IVOKA. 1. Occipital bone. The eminence whi< h constitutes the 



ni:u> "i i HI. rh. ; !<> TI.KUH: 



1. o.-cipital protuberaii' 



pital foramen; 3, Occipital con- 

 lylf, 4, Condyloid foramen; 5, 



ir process; 6, 6, Mast, i 

 7, Stylniil process of the occipital 

 bone; 8, Articular surface of the 

 temporal bone; '.'. Ma-toil protu- 

 iM-i-aii.,.; lo. Foramen lareruni ; 11, 

 SnIi.-phcnoiJal process extcnnl 

 wing of pterygoid pn>er-- ; r_', 

 Palatine cn.--t ; \'->. \'\>-r\ ^< i^l I'""'- 

 internal winj; "f th.- pr 



!. liiti-riir oriticf .if the 

 palatine c.iual ; 1">, 1"', 

 opening-. 



