SUBCLAVIAN, AND ITS BRANCHES. 217 



the hand. They anastomose with branches from the ulnar and 

 interosseous arteries of the fore arm. 



*/ 



5. The Magna Pollicis, a terminating branch of the radial, 

 comes from it in the palm of the hand just at the root of the 

 metacarpal bone of the thumb. It runs beneath the abduc- 

 tor indicis, and at the head of the metacarpal bone divides 

 into two branches wi>ich go respectively along the sides 

 of the thumb to its extremity, where they anastomose and ter- 

 minate. 



6. The Radialis Indicis, arising at the same place with the lat- 

 ter, runs along the metacarpal bone of the fore finger, and along 

 the radial side of the same finger to its extremity. 



7. The Palmaris Profunda is the third terminating branch of 

 the radial artery. It arises near the same place with the two 

 last, crosses the hand between the metacarpal bones and the 

 flexor tendons; thus forming the Arcus Profundus, from which 

 branches proceed to the interossei muscles; and which ends on 

 the ulnar side of the palm of the hand by a connexion with 

 the Arcus Superficialis. 



Of the Ulnar Artery. 



The Ulnar Artery, (Jlrteria Ulnaris,) one of the forks of the 

 brachial at the elbow, passes more in a line with it than the ra- 

 dial artery does, It goes, immediately after its origin, under 

 several of the muscles of, the internal condyle, to wit : the pro- 

 nator teres, flexor radialis, flexor sublimis, and palmaris longus, 

 and between the flexor sublimis and profundus digitorum, be- 

 ing deeply seated; getting from beneath the flexor sublimis, it 

 afterwards runs parallel with the ulna, or nearly so, lying on 

 the flexor profundus between the flexor ulnaris and the uKiar 

 margin of the flexor sublimis, and concealed two-thirds of the 

 way down the fore arm by the overlapping of these muscles. 

 At the thin part of the fore arm, commonly called the wrist, it 

 is superficial, and may be felt pulsating in the living body at 

 the radial margin of the tendon of the flexor ulnaris. 



The ulnar artery, at the carpus, takes a very different course 

 VOL. II. 20 



