62 



ANIMAL BIOLOGY 



FIG. 96. PILL 

 BUG. 



' 



FIG. ioi. ONE SEG- 

 MENT OF CENTIPEDE 

 with one pair of legs. 



FIG. 102. 

 ONE SEGMENT 

 OF THOUSAND 

 LEGS with two 



pairs of legs. 



a b 



FIG. 99. TICK 



before and after 



feeding. 



'JS 



.(3 



FIG. 103. THOUSAND 

 LEGS. 



FIG. zoo. 

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



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



