Skull of White Tailed Deer 

 A plant eating animal. Note the absence of canine teeth. 



dififerent shapes of mammals are due to the faet that 

 certain bones may be larger or smaller, and of differ- 

 ent form, than the corresponding bones in other species. 

 The mammalian skeleton is composed of two main 

 portions, the AxiAL, and APPENDICULAR. The former 

 includes the SkULL, BACKBONE or VERTEBRAL COL- 

 UMN, Ribs, and Breast Bone or Sternum. The Ap- 

 pendicular portion is composed of the LiMB BoNES 

 and the bones attaching them to the TRUNK. 



The skull is a highly complex structure, composed 

 of many parts, most of which are immovably joined 

 together. It is the seat of the principal sense organs 

 such as the eyes, ears, nose and mouth. It also affords 

 a well protected cavity for the Brain, in addition to 

 carrying the Teeth. The lower jaw is movable and en- 



