174 THE MYOLOGY OF THE RAVEN. 



99. Tlie hiceps flexor cruris ^ is a single-headed 

 muscle among birds, as it is here in the Raven. It 

 constitutes the principal one of those muscles holding 

 the more anterior position in the group at the hack of 

 the thigh. It arises beneath the gluteus j^i'inius by a 

 tendinous fascia from the postacetabular ridge, extend- 

 ing between the antitrochanter and the anterior point of 

 insertion of the semitendinosus. In form this muscle is 

 flat and triangular, the fibres converging as they descend 

 towards the knee. 



All of this group of rear- thigh muscles lie in a plane 

 or planes roughly parallel to the median, longitudinal 

 plane of the body. After passing the knee-joint the 



^ Extraordinary it surely is to find the number of names that this 

 muscle has received at the hands of anatomists, inasmuch as it is 

 easily distinguished, and possessed of peculiar characters. No two 

 writers out of a dozen have given it the same name, and Gadow 

 has given the subjoined synonymy for it (Bronn's T/der-Meichs, vi. 

 Bd. p. 168) :— 



" 39. M. ILIO-FIBULARIS. 



31. oc'dvus tihiam movens. Aldrovandi. 

 Biceps. Vicq d'Azyr, p. 277, No. 3. 



,, Cuvier, p. 523 ; Q.uennerstedt, p. 25. 



Neander, p. 16 ; Selenka, p. 143 ; De Man, 126, No. 12. 

 Zugespitzter Wadenbeinmuskel. Merrem, p. 159, No. 5. 

 Flexor cruris anterior. Wiedemann, p. 96. 

 Flexor cruris jmiinis anterior. Tiedemann, § 299. 

 Aeusserer oder Wadenbeinbeuger. Meckel, /System., p. 361, No. 2 ; 



[and] Archiv, p. 271, No. 10. 

 Flexor cruris Jibularis. d'Alton, p. 34. 

 Caput breve hicvpitis femoris. Gurlt, p. 34. 

 Biceps Jlexor cruris. Owen. 

 Pulsator. Sundevall. 

 Biceps femoral. Gervais et Alix, p. 32. 



Alix, p. 440. 

 Biceps cruris. Gar rod. 

 Biceps femoris. Watson, p. 112. 

 M. ilio-fibularis. Gadow, No. 27." 



