678 



TEE ARTERIES. 



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

 cranii, this vessel passes into tlie condyloid foramen, which also aflbrds a passuge to the hyjw- 

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

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

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

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

 muscular branches in the Horse. 



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

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

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



It comuiunicates, after its entrance into the cranial cavity, with the rete miraUle. 



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

 internal maxillary arteries, this vessel sends oflfon 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 suh- 



Fij. 382. 



THE RETE MIRABILE OF THE SHEEP, SEEN IN PROFILE. 



1, Carotiil nrtery ; 2, occipital artery; 3, lingual artery; 4, maxillo-muscular artery; 5, pi^sterior 

 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-spinnus artery ; 13, deep posterior temporal arterv ; 14. deep anterior temporal 

 artery; 15, commencemeut of the originating arteries of the rete mirahUe ; 16, encephalic rete 

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

 artery; 19, ophthalmic rete mirahile; 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 styh-mastoid arteriole, 

 which penetrates the aqueduct of Fallopius. 2. Cnneho-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 tJiis canal by the wide orifice in the temporal fossa, 

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

 arteries; and an internal— a considerable meningeal artery — de.stined principally to the falx 

 cerebri and the tentorium cerehelli. 



