16 MR. F. E. BEDDARD ON THE [Jan. 6, 



(13) Rector remigium. — The tendon of this muscle is inserted on 

 to ulnare close to the insertion of the last-mentioned muscle ; its 

 fibres are connected with the remiges and also with the sheath of 

 the flexor carpi ulnaris. 



(14) 'Y\\e Flexor metacarpi poUicis arises from the radius: its 

 tendon is inserted in common with that of the flexor sublimis. 



II. Muscles OF THE Hind Limb. — (1) The Glut ceus maximus 

 is enormously developed, reaching to the patella and hiding most of 

 the flexors of the thigh. 



(2) The Semimembranosus (fig. 3, Sm., p. 17) is inserted by a 

 long and thin flat tendon on to the inner side of the tibia, just 

 below the ligament binding this bone to the femur. 



(3) The Semitendinosus (fig. 3, St.^ arises from a part of the ilium 

 which is not occupied by the origin of the biceps ; it gives off a large 

 and entirely fleshy accessory semitendinosus (fig. 3, A) ; between this 

 latter and the main part of the muscle is a diagonally running ten- 

 dinous raphe, which is visible only on the inferior aspect of the muscle ; 

 just at this point the superior surface of the muscle is connected by 

 a short tendon to the gastrocnemius. The insertion of the semi- 

 tendinosus is effected by a flat thin tendon which joins the tendon of 

 the semimembranosus about half an inch in front of their common 

 insertion upon the inner side of the tibia. In the Herons (in 

 Nycticorax, Cancromd) and in Scopus the semimembranosus is 

 attached by a separate tendon to the tibia ^ ; the semitendinosus is 

 not inserted there at all ; in Psophia the muscles are inserted by 

 a common tendon, in Ocydromus by separate tendons. 



(4) The Biceps is a broad flat muscle which has the usual form 

 and relations ; it passes through a tendinous loop as in nearly all 

 birds before its insertion by a stout tendon on to the fibula. 



(5) The Ambiens, as Garrod has stated [19], is present. 



(6) The Femorocaudal is a slender muscle which narrows suddenly 

 into a thin tendon which is nearly one half of the entire length of 

 the muscle. It arises quite in the usual way from the caudal vertebrae 

 and is inserted on to the lower border of the femur. 



(7) There is no accessory femorocaudal, 



(8) The Gastrocnemius arises by four separate heads (woodcut, 

 fig. 3) : — the outer head is attached to the femur in common with the 

 outer loop of the biceps sling ; the second head is smaller and is formed 

 by a short flat tendon attached to the femur ; the third head receives 

 a tendon from the semitendinosus and runs up to the femur in close 

 relations with the accessory semitendinosus, it has an attachment also 

 to the inferior of the two adductor muscles ; the fourth head is formed 

 by a broad flat tendon to the head of the fibula. 



(9) The Planfaris is a long muscle with a fleshy origin from the 

 hinder part of tibia just below the internal femoro-tibial ligament ; 

 the origin extends as far down as the insertion of the ligament. 



(10) The Peroneus longus is a very large and strong muscle, the 



■^ Mr. Weldon, however, states that in Fhosnicopterus and the Storks these 

 muscles are inserted in common [21, p. 645]. 



