250 THE MYOLOGY OF THE HAVEN. 



We find a well-developed popUteus muscle in Geo- 

 coccyx calif ornianus, where it is seen to arise from an 

 oblique line on the back of the tibial shaft below the 

 head of the bone, and the fibres converging to pass 

 upwards and outwards are inserted by a short tendon 

 into the corresponding aspect of the head of the fibula, 

 close to the superior fibres of insertion of the jiexor 

 perforans digitorum j^^'oftmdus. 



The several flexor muscles of the pelvic limb of the 

 Eaven which we have been describing in the last few pages 

 can be compared with great profit with the corresponding 

 muscles as they occur in a bird with zygodactyle feet. 

 The species to which we have been referring for that 

 purpose in this work is Geococcyx calif ornianus, and, as 

 has already been noted, the writer presented some ob- 

 servations upon its myology in the Proceedings of the 

 Zoological Society of London for 188G. From that 

 paper I here republish my remarks upon these flexor 

 muscles as they were found to exist by me in Geococcyx, 

 in order that the comparisons can be made which have 

 been suggested above. 1 remarked that in Geococcyx 



Popliteus. Owen, 



„ Quennerstedt, p. 36. 



,, Neander, p. 21. 



Gadow, No. 28. 

 „ Watson, p. 116. 



Kniekehlenmuskel. Meckel, Siji^tem, p. 369, No. 2 ; Archiv, p. 272, 



No. 11. 

 Le pojilite. Gervais et Alix, p. 33. 



" Ausserordentlich klein ist der M. jmpliteus bei den kletternden 

 Vogeln, auch bei Guculus, wahrseheinlich ganz feldeud bei Psittacus, 

 Picus, und Cypselus. Dagegen ist er recht anselmlich bei Capri- 

 mulgus, Strix, Buteo, Gallus, Numenius. Schvvach bei Anser, Grus, 

 Fulica, Larus, Gohjmhus, Ciconia, Serpentarius." 



