46 LABORATORY WORK. 



limb, naming parts, remembering that the radius is on 

 the side of the thumb, the tibia on that of the big toe. 



In the skull is the socket (orbit} of the eye completely 

 enclosed in bone. How does the lower jaw join the skull? 

 What is the means for articulation of the skull with the 

 vertebrae of the neck? Are the vertebrae of the neck hol- 

 low in front, behind, or on both surfaces? Examine each 

 and decide which ones are amphicoelous (p. 27), which 

 procoelous (hollow in front), which opisthoccelous (hollow 

 behind), and which will fit none of these categories. 



