62 



ANIMAL BIOLOGY 



FIG. 96. PILL 

 BUG. 



FIG. 101. ONE SEG- 

 MENT OF CENTIPEDE 

 with one pair of legs. 



FIG. 102. 



ONE SEGMENT 



OF THOUSAND 



LEGS with two 



pairs of legs. 



FIG. 99. TICK 

 before and after 

 feeding. 



FIG. 103. THOUSAND 

 LEGS. 



FIG. loo. 

 CENTIPEDE. FIG. 104. A SPIDER. FIG. 105. KING CRAB. 



Illustrated Study. CLASSIFICATION OF ARTHROPODS. Key on p. 61. 



