FIG. ,2i3. Skeleton of the 

 common fowl, male. 



1, premaxilla; 2, nasal; 

 3, lachrymal ; 4, frontal ; 

 5, mandible ; 6, lower tem- 

 poral arcade ; 7, tympanic 

 cavity ; 8, cervical vertebra ; 

 9, ulna ; 10, humerus ; 11, ra- 

 dius ; 12, carpo-metacarpus ; 

 13, first phalanx of second 

 digit; 14, third digit; 15, 

 second digit; 16, ilium; 17, 

 ilioischiatic foramen; 

 18, pygostyle; 19, femur; 

 20, tibiotarsus; 21, fibula; 

 22, patella ; 23, tarsometa- 

 tarsus ; 24, first toe ; 25, 

 second toe; 26, third toe; 

 27, fourth toe; 28, spur; 

 29, pubis; 30, ischium; 31, 

 clavicle ; 32, coracoid ; 33, keel of sternum ; 34, xiphoid process. 

 Shipley and MacBride.) 



(From 



336 



