100 



A COURSE ON ZOOLOGY. 



racic cage stronger. A certain number of the lumbar 

 and sacral vertebrae are firmly united together. 



There are fourteen cervical vertebrae, all long and very 

 mobile, and seven dorsal vertebrae. 



The skull is well developed, and its bones are united in 



Pelvis 

 Coccyx 



Beak 



Spinal column 



Breast-bone 



Thigh 



Sternum 



Toes 



SKELETON OF CHICKEN. 



a single compact mass. It is articulated with the verte- 

 bral column by a single condyle. 



The forelimbs are only supports for the feathers which 

 serve in flight. The hand is only a sort of stump, com- 

 monly called the pinion. The shoulder, besides the clav- 

 icles, properly speaking, which are united together in 

 front, forming the " wish-bone," has a well-developed sup- 

 port in the coracoid process of the scapula, which forms 



