ANGEIOLOGY. 99 



", its union with the ophthalmic vein ; ", frontal vein ; ", occipital vein ; 

 ", superficial temporal vein ; '*, axillary vein ; ", the cephalic vein, 



PL 136, ßg. 1 ', right auricle; ", superior vena cava; % internal mam- 

 mary ; \ a vein of the diaphragm ; \ right subclavian vein ; ', right internal' 

 jugular vein ; ', right external jugular; ', left subclavian ; °, lower thyroid; 

 '", left mammary; ", left internal jugular ; ", left external jugular. Fig. 7, 

 sinuses of the falx cerebri : ', superior longitudinal sinus ; *, inferior do. ; 

 '% straight sinus ; \ great meningeal vein ; ', confluence of the sinuses. 

 Fig. 8, sinuses at the base of the skull : ', place of entrance of the superior 

 longitudinal sinus into the torcular ; ^, horizontal portion of the lateral 

 sinus ; \ its descending portion ; % mouth of the internal jugular ; ', superior' 

 petrosal sinus ; ", cavernous sinus ; ', transverse branch along the sella 

 turcica to form the transverse sinus. Fig. 9, point of confluence of the 

 sinuses or the torcular herophili, opened : \ superior longitudinal sinus ; 

 ', opening of the straight sinus; ^'% openings of the posterior occipital' 

 sinuses; *'\ openings of the lateral sinuses. Fig. 10, a parietal bone, with 

 the outer table removed to show the diploic veins. 



B. Veins of the Superior Extremities. 



The veins of the upper extremities are superficial and deep. The prin- 

 cipal superficial veins are the cephalic, basilic, and median. The superficial 

 veins of the hand are principally on the dorsal aspect. On the back of the' 

 hand there is a venous arch or series of arches, which receive two freely 

 anastomosing veins from each finger. From this arch branches ascend, 

 two of which being larger and more regular, have received distinct names, 

 cephalic and basilic. 



The cephalic vein commences on the outer and back part of the carpus, 

 ascends to the bend of the elbow, and continuing along the outer side of 

 the biceps, turns forward towards the shoulder, and sinks deep between the 

 pectoral and deltoid muscles to join the axillary vein. 



The basilic vein commences from the dorsal arch near the lower end of 

 the ulna. One branch from the little finger is termed salvatella. Ascend- 

 ing along the ulnar side of the forearm, it passes before the internal 

 condyle, and continuing up the inner side of the arm, joins the axillary 

 vein. 



The median vein arises a little above the wrist, and ascends along the 

 middle of the forearm to the bend of the elbow. It here divides into two 

 branches ; one (median basilic) joins the basilic vein, the other (median 

 cephalic) joins the cephalic vein. 



The deep veins accompanying the brachial artery and its branches in 

 the arm and forearm, two with each inclosed in the same sheath. These 

 end in the 



Axillary Vein, which ascends in front of the arterj^, receives the thoracic 

 veins, passes beneath the clavicle, and opposite the lower edge of the first 

 rib is named 



Subclavian Vein. This passes inwards, receiving several veins from 

 the shoulder and sides of the neck, as also the jugular veins, and opposite 



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