1883.] 



ANATOMY OF PHCENICOPTERUS. 



649 



tions, separate in origin and insertion, but so situated that each has 

 almost all the relations of the typical sartorius. 



Of the tensor fascice only the post-acetabular portion is left. 



The biceps, semimembranosus, and semitendinosus closely resemble 

 those of the Storks, as does also the mode of union of the accessory 

 semitendinosus with the gastrocnemius. 



There are two distinct adductors, as in Storks, while in many, if 

 not in all, Geese there is only one. 



The ambiens is small, and simply joins the flexor perforatus in the 

 leg ; while in xlnatidae it acquires a connexion with the tibia on the 

 one hand, and with both the flexors on the other. 



I<'e. 



Diagrams of origin of flexor perforatus : Ca, in LeptoptUvs, Cb, in Phani- 

 copterus, Cc, in the Duck. 



Fe, Attachment to femur ; Fe.P.P, slips to iiexor perforatus et perforans. In 

 Duck, A9n., ambiens tendon ; Ti., its tibial insertion ; F.Prof., one belly 

 of flexor profundus. 



The three-headed origin of the gastrocnemius, and its mode of 

 union with the accessory semitendinosus are also essentially Stork-like. 

 In the Duck, for example, where there is no accessory semitendinosus, 

 there are only two heads to the gastrocnemius, the inner of which 

 receives a muscular slip from the tendon of the biceps. 



These relations will be easily understood on comparing in fig. 3, 

 p. 648, Ba and B6 with Be. 



The long flexors of the leg are also very Stork-like. 



The flexor perforatus in Phocnicopterus arises by four heads, one 



