, .\YA. 609 



ficial and deep temporal veins, which have their principal roots in these 

 oonflaents, 



The Knlifi^liniiililtil cmijlii, '/,/* extend on the sides of the body of the 

 sphenoid bone and the busilur process, from the base of the Bubsphcnnidal 

 process to the condyloid fossa, by concurring in the obturation or closing 

 of the occipito-sphcno-tcniporal hiatus. They open at their middle portion 

 into the corresponding cavernous sinus, by an oval aperture which the in- 

 ternal carotid artery traverses in penetrating into the cranium. The anterior 

 extremity terminates in a cul-de-sac. Posteriorly, they communicate through 

 the condyloid foramina with the occipito-atloid sinuses. The vessels which 

 carry off the blood from these confluents arc the pterygoid veins, and the 

 anterior root of the occipital vein. Wo already know that the posterior 

 branch of the latter vessel removes the blood directly into the occipito-utloid 

 sinuses. 



b. The emergent veins of the spinal sinuses present a more simple dis- 

 position. At each intervertebral space arise several branches, which more 

 particularly make their exit by the intervcrtebral foramina to join tho 

 neighbouring veins ; in the cervical region, the vertebral veins servo as n 

 tacle in this way for the venous branches emanating from the spinal 

 sinuses ; in the dorsal region, it is the spinal branches of the intercostals ; 

 in the loins, tho analogous branches of the lumbar veins ; and in tho sacral 

 region, the lateral sacral vein. 



AXILLARY VEINS. 



A general confluent of all the veins of the thoracic limb, and of some 

 from the trunk, the axillary vein commences beneath the scapulo-humeral 

 articulation, towards the terminal extremity of tho corresponding arterial 

 trunk, accompanying the latter to the entrance of the chest, and joining the 

 confluent of the jugulars to constitute, with these two vessels, the inferior 

 vena cava (293, 18). 



In studying, from their origin to their termination, tho numerous 

 branches which concur in the formation of this venous trunk, wo re- 

 ise : 



1. That they form in tho foot a very rich network, from which proceed 

 the i1i<j'ital veins, satellite vessels of the homonymous arterit s. 



2. That to these digital veins, which are united in an uivh above tho 

 largo sesamoids, succeed three metaearpal In-nm-lti-* or m/At/oW* / tin- 

 cannon : two superficial*, placed on each side of tliu flexor tendons, and a 



"// ('or ileep) vein, situated underneath the suspensory ligament, along 

 with the interosseous arteries. 



3. That tho mctacarpal veins also open into each other, in the superior 

 and posterior region of the carpus, to form, on again separating, two groups 



'ilifiu-li inl veins: one group comprising the nlmn- and the /w< /W or 

 internal radial*, which accompany the arteries ( ,f the same name ; tin- other, 

 constituted by a single subcutaneous branch, the /;/*//',// >///, which receives 

 at its superior extremity tho anterior tttperfidal /<//<// rein. 



4. That at the ulnar articulation, these, two groups .f antibr.ichial veins 

 join the satellite vessel of the ant< //"/ /.//-/ m-ltri/. and communicate by a 

 very compile -at< <1 >\-t<ni of anastomoses, from which results a principal 

 trunk, the lun,n i\i! i< in. 



iiut the lnii.irnil i- 1 in, after receiving on its course scvi nil muscular 



