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I'lilACU'LES OF ANIMAL JiJOLOGY 



Fig. 100. — Seta and muscles in the earthworm, drawn from a longitudinal section anterior 

 -« the clitellum. cm, circular muscles; Im, longitudinal muscles. (Original.) 



A B 



Fig. 101. — Relation of muscle to hard parts in appendages of insect and man. A, 

 leg of insect; B, leg of man; /, femur; /s, skeleton of foot; ?, insertion of muscle; m, niu.scle; 

 o, origin of muscle; ta, teudo-Achilles ; ti, tibia. (A after Berlese- B after Hesse and Doflein.) 



