134 THE MYOLOGY OF THE KAVEN. 



It is also found in tlie Horse, where the thuml) is 

 entirely absent. I fail to find an extensor metacarpi 

 radialis hrevior, so frequently described for birds by 

 other authors, and it is just possible that this is the 

 muscle alluded to by them. Of it, Owen says that it 

 arises below the preceding [e.xtensor 7netacarpi radialis 

 lon(jior~\ from the uhiar edge of the radius, and is inserted 

 into the phalanx of the thumb immediately beyond the 

 tendon of the preceding muscle [extensor metacarpi 

 radialis longior']. The two tendons are quite distinct 

 from one another in the birds of prey, the Ostrich and 

 Parrots, but unite at the lower end of the forearm in 

 the Anatidce, Phasianidce, and Gruidce'' (Anat. of Verts., 

 vol ii. pp. 98-99). 



80. The anconeus'^ is a very powerfully developed 

 muscle in the forearm of the Raven. It arises by a 

 short, though strong, subcylindrical tendon from the 

 lower aud back part of the external condyle of the 

 humerus, and passes directly to the latero-radial side of 

 the shaft of the ulna, alomx which it attaches itself to a 

 point somewhat beyond its middle (Figs. 30 and 37). 



On its inner side it is in intimate relation with the 



1 " 83. M. ECTEPICONDYLO-ULNARIS. 



Lejlechisseur in-ofond de Vavant bras. Vicq d'Azyr, 1773, p. 573, 



No. 8 ; Cuvier. 

 Oline Namen. Merrem, Fig. 3, v. 

 Kurzei* EUenbogenstrecker. Wiedemann, p. Ul. 

 Unterer Kurzer oder vierter EUenbogenstrecker. Meckel, p. 329, 



No. 6. 

 Flexor antibrachii ]y)-qfundus. Schopss, p. 142, No. 29. 



Gurlt, p. 23, No. 6. 

 „ ,, ,, Watson, p. 62. 



Ancone. Alix, p. 407. 

 Anconceus quartus. De Man, p. 115. (Von Tiedemaun, Prechtl, 



und Selenka nicht erwiihnt.) " (Gadow, loc. cit., p. 268.) 



