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 vertebra}, all long and very 

 mobile, and seven dorsal vertebrae. 



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



Beak 



Spinal column 



Pelvis 

 Coccyx 



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 



