TEE COMMON CAROTID ABTEBIES 



C93 



Internal maxiOary artery.— It does not traverse the subsplienoidal canal, as that 

 bony passage does not exist. 



The following are its piinoipal branches : 



1. The inferior dental artery, whioli emits some pterygoid ramuscules. 



2. Ihe sphenospinous artery, arising from the same point as the precedins:, often in 

 common with it, giving also some pterygoid branches, and entering the cranium by the 

 oval foramen to aid in the formation of the rtfseau admirahU, in a way to be indicated 

 nereatter. 



3. The deep posterior temporal artery, which detaches a masseteric artery. 



4. The deep anterior temporal artery. 



5. The hiccal, principally destined to the masseter muscle. 



6. The ophthalmic artery, longer than in the other animals, forming a loop before 

 traversiag the orbital foramen, and giving a supra-orbital branch and a fasciculus of 

 muscular and cihary arteries. Near the point where the originating trunk of this 



Fig. 287. 



THE RESEAtr ADMIRABLE OF THE SHEEP, SEEN IN PKOFILE. 

 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 reseau admirable; 16, Ence- 

 phalic reseau admirable ; 17, Trunk of the encephalic arteries arising from the 

 reseau admirable; 18, Ophthalmic artery; 19, Ophthalmic reseau admirable; 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 



fasciculus is detached, the ophthalmic artery shows on its course a very curious arrange- 

 ment which has not yet been noticed, we believe : this is a veritable arterial plexus in a 

 ganglionic form, in principle exactly disposed as that about to be described (Fig. 287, 19). 



7. The originating arteries of the reseau admirable, usually consisting of two principal 

 vessels, arising with the ophthalmic, passing backward through the suprasphenoidal 

 canal, and ramifying in a special manner to form a mass of reticular twigs, designated 

 the reseau admirable (Pig. 287, 16). 



This network is a small ovoid mass, elongated from before to behind, placed beneath 

 the dura mater, on the side of the sella turcica, within the superior maxillary nerve, and 

 composed of a multitude of fine arterial divisions which anastomose with each other 



