OT8 THE ARTERIES. 



head, and a small meningeal branch whicli enters the cranium by the foramen lacerum basis 

 cranii, this vessel passes into the condyloid furamen, which also affords a passage to the hypo- 

 glossal nerve, places itself beneath the dura mater, and is inflected backward to open into the 

 anterior extremity of the collateral artery of the spine, at the superior foramen of the atlas. 

 The branch resulting from this junction emerges by that foramen, to be distributed in the 

 muscles of the neck, where its divisions resemble those of the occipito-muscular and atloido- 

 muscular branches in the Horse. 



In traversing the condyloid foramen, the occipital artery sends into the parieto-temporal 

 canal, by a peculiar bony conduit (see p. 50), a very small filament which is distributed to 

 the dura mater, in anastomosing with a branch of the posterior auricular. 



It communicates, after its entrance into the cranial cavity, with the rete mirabile. 



External Carotid Artery. — Terminated, as in the Horse, by the superficial temporal and 

 internal maxillary arteries, this vessel sends off on its course : 



1. A pharyngeal artery, the origin of which is nearly confounded with that of the occipital 

 artery. 



2. The lingual artery, furnishing a collateral branch which exactly represents the sub- 



Fig. 382. 



THE RETE MIRABILE OF THE SHEEP, SEEN IN PROFILE. 



1, Carotid artery ; 2, occipital artery; 3, lingual artery, 4, maxillo-muscular artery; 5, posterior 

 auricular artery ; 6, superficial temporal artery; 7, anterior auricular artery ; 8, middle temporal 

 artery; 9, transverse artery of the face; 10, internal maxillary artery; 11, inferior dental 

 artery; 12, spheno-spinous artery ; 13, deep posterior temporal artery ; 14, deep anterior temporal 

 artery; 15, commencement of the originating arteries of the rete mirabile; 16, encephalic rete 

 mirabile; 17, trunk of the encephalic arteries arising from the rete mirabile; 18, ophthalmic 

 artery ; 19, ophthalmic rete mirabile ; 20, common origin of the arteries of the eye ; 21, 

 supra-orbital artery; 22, buccal artery; 23, superior dental artery; 24, orbital branch of the 

 latter ; 25, palatine artery ; 26, nasal artery. 



mental of Man, and is divided into two branches that resemble the sublingual and ranine 

 arteries. 



3. A large division for the maxillary gland. 



4. The posterior auricular artery, from which proceeds : 1. The stylo-mastoid arteriole, 

 which penetrates the aqueduct of Fallopius. 2. Concho-muscular branches. 3. A large 

 branch, resembling the mastoid artery of the Horse. This enters the temporo-parietal canal 

 by a small foramen between the occipital and petrous portion of the temporal bone, and forms 

 two branches : an external, emerging from this canal by the wide orifice in the temporal fossa, 

 and expending itself in the temporal muscle, after anastomosing with the two deep temporal 

 arteries; smd an internal — a considerable meningeal artery — destined principally to the falx 

 cerebri and the tentorium cerebelli. 



