100 



STRUCTURE AND CLASSIFICATION OF BIRDS 



Flexor Profundus. Arises from nearly whole hinder 

 surface of tibia and fibula, and sometimes also by a head 

 from the outer condyle of femur. 



Flexor Hallucis. Arises by a single head, or by two 

 heads, from the outer- condyle of femur and from inter - 

 condylar region. 



The tendons of the two last-described muscles are con- 



V- 



FIG. 54. Gallus bankiva (AFTER FIG. 55 Apteryx Mantelli (AFTER 

 GARROD). GARHOD). 



nected with each other in various ways, which have been 

 described and illustrated by Mr. GARBOD.' In using his 

 figures I accept the seven types admitted by Dr. GADOW. 2 



(1) In gallinaceous birds, pigeons, parrots, storks, &c., the 

 tendons cross, and are united by a simple vinculum (fig. 54). 



1 ' On the Disposition of the Deep Plantar Tendons in different Birds, v 

 P. Z. S. 1875, p. 339. 



2 In Newton's Dictionary of Birds, p. 617. 



