80 



THE CAT. 



[CHAP. in. 



of the auditory bullao and the hasi- occipital is the large and con- 

 spicuous foramen lacerum poster ins (11), which transmits the jugular 

 vein and the glosso-pharyngeal, par vagum and spinal accessory 



Fig. 46. SIDE VIEW OF THE CRANIUM, THE LOWER JAW AND THE HYOIDEAN ARCH 



BEING SOMEWHAT DETACHED. 



n. (Just above 6 and 7). Ali-sphenoid. 



o. Meatus auditorius externus. 



an. Angle of mandible. 



ar. Ascending ramus. 



&. Auditory bulla. 



Hi. Basi-hyal. 



c. (Of cranium) occipital condyle. 



c. (Of mandible) coronoid process. 



ch. Cerato-hyal. 



eh. Epi-hyal. 



/. Frontal. 



lir. Horizontal ramus of mandible. 



ip. Inter-parietal. 



j. Malar (or .iugal). 



la. Lachrymal. 



m. Maxilla (its nasal process). 



m-s. Mastoid process. 



n. Nasal. 



os. Orbito-sphenoid. 



p. Parietal. 



pa. Palatine. 

 pt. Pterygoid. 

 pm. Pre-maxilla. 

 s. Squamosal. 

 tylo-hyal. 



so. Supra-occipita 

 t*. Cartilage of tv 



ital. 



Cartilage of tympano-hyal. 

 th. Pit of tympano-hyal. 

 ?/. Apex of lambdoidal ridge. 

 z. Zygoma. 



'2. Infra-orbital foramen. 

 0. Optic. 



7. Sphenoidal fissure. 



8. Foramen rotumtaus. 



9. Foramen ovale. 



12. Stylo-mastoid foramen. 



13. Mental foramina. 



The spheno-palatine foramen is shown just 

 above, and in front of pa, close to posterior 

 margin of anterior end of zygoma. 



nerves. This foramen is bounded behind by the exoccipital (pp), 

 which is perforated by the anterior condyloid foramen transmitting 

 the hypoglossal nerve. At the anterior wall of the foramen lacerum 

 posterius is the opening of a very small canal (for the minute 

 internal carotid artery) which runs forwards (between the basi- 

 occipital and basi-sphenoid on one side, and its auditory bulla 

 on the other) to open inside the cranium beside the sella turcica. 



