Fig. 144. — Skeleton of a Bird (Common Fowl.) /, preniaxiUa; i", nasal; 3, 

 lachrymal; 4, frontal; 5, mandible; (5, lower temporal arcade in region of quad- 

 ratojugal; 7, tympanic cavity; S, cervical vertebra?; 9, ulna; 10, humerus; 11, 

 radius; U, carpometacarpus; 13, hrst phalanx of second digit; 14, third digit; 

 15, second digit; W, ilium; 17, ilio-ischiatic foramen; IS, pygostyle; 19, femur; 

 W, tibio-tarsns; 'Jl, fibula; 'J2, patella; JS, tar.'^o-metatarsus; :.-'-{, first toe; ~5, . 

 second toe; 26, third toe; 37, fourth toe; JS, spur; J.'^, pubis; SO, ischium; 31, 

 clavicle; 3.2, coracoid; 33, keel of sternum; 34, xiphoid. The forked bone in front 

 of 7 is the quadrate. (From Shipley and McBride.) 

 268 



