784 



MR. ST. GEORGE MIVART ON THE 



[June 27 



pronator teres. It is inserted into the carpal bone, wliick articulates 

 with the radius, and also by a small tendon running on (figs. 6 & I 2) 

 into the radial side of the metacarpal of the pollex. 



Fig. 11. 



Deep miipcles of extensor surface of right forearm. 



E. C. Extensor comiinmis digitorum. E. C. U. Origin of extensor carpi ulnaris 

 and common insertion of extensor and flexor carpi ulnaris. E. M. I'. Ex- 

 tensor ossis metacarpi pollicis. <S'. L. Supinator longLis. P. Q. Pronator 

 quadratus. 



12. 



Deep muscles of flexor surface of right forearm, the flexor carpi radialis, flexor 

 carpi ulnaris, and flexor profundus digitorum being cut and reflected. 



B. Biceps. F. C. R. Flexor carpi radialis. F. C. U. J'lexor carpi ulnaris. 

 F.P.D. Plexor profundus digitoruui. P. A. Pronator accessori us. P. Q. 

 Pronator qtiadratus. J'. T. Pronator teres. S.A. Supinator accessorius. 

 <S'. L. Supinator longus. 



Pronator accessorius (fig. ) 2, P. A.). A muscle I so name provi- 

 sionally, arises from the anterior surface of the internal condyle, 

 immediately beneath the humeral origin of the flexor profundus digi- 

 torum. It is inserted into the radius between the insertion of the 

 pronator teres and tliat of the pronator quadratus. 



