50 Till-: 



protuberance is obtuse, nnd gives rise on cadi side to the superior curved liner,; in tin- 

 She, p. these curved liiu's are very salient nnd occupy the summit of the h. ad. 



The sty loid processes are short and much bent inwards. The hu-ilar prix-. <s. wide. 

 short, and thick, has a groove in the middle of its external face ; this groove ia som> 

 absent in the Sheep nnd Goat. 



The condy loid foramina are double, sometimes triple ; the superior foramen does not 

 pass directly into the cranium, but goes to a vast conduit that oj nshdiind on tin- lateral 

 margin of the occipital foramen, and which terminates in front bj two orifice- 

 entering the parieto-temporal canal, the other opening on the external surface of the 

 bone. The foramen lacerum is divided into an anterior and posterior foramen 1>\ tin 

 mastoid portion of the temporal bone. 



2. Parietal lone. The parietal bone in the Ox does not occupy the anterior aspect 



Fig. 27. 



ox's HEAD; ANTERIOR FACK. 



1, Mastoid process; 2, Superciliary, or supra-orbital foramen; 3, Zygoma; 4, 

 Lachrymal bone ; 5, Maxillary spine ; 6, Inferior orifice of the supermaxillo-dental 



canal. 



of the head, but concurs with the occipital to form the base of the neck. It represents a 

 -, i i\ narrow osseous plate, elongated transversely, and curved at its two extn inities, 

 which descends into the temporal fossan to rest upon the sphenoid bone. There are no 

 parietal ridges. The internal protuberance is only marked by a slight elevation of the 

 internal plate ; for the most part it belongs to the occipital IMHIC. 



The pari-t:tl l>ono of the Ox is developed from three centres of ossification, and the 

 middle nucleus is even primarily divided into lateral halve* ; but these centres are 

 consolidated with each other at an early period, as well as with the anterior portion of 

 the occipital. It does not aid in the formation of the jiarieto-teinj-oral canal, and is 

 excavated internally by cavities which communicate with the frontal sinuses. 



The parietal bone of the *!,,<], and Cunt is relatively mudi larger than that of the Ox. 

 It participates in the formation of the parieti. -temporal canal, and hits no sinuses. 



:;. l-'ntiiliil bone. In ruminants, the frontal bone doe* not respond to the temporal 



and palate hones. 



In the Or, this I '"IM i- . \\i- mely developed, bjrlitelf <-eiip\ in^ the anterior half of (lie 



