Fig. 305a. 1, the common garden-spider (Epeira): a,, leg; 6, maxillary 

 palpus; c, poison-jaws; e, spinnerets. 2, Front view of head with the eight sim- 

 ple eyes and the poison-jaws. 3, end of a jaw: a, outlet of the poison-canal. 

 7, palpus of female; 8, of a male spider. 



4, spinnerets, highly magnified. 



spines and claws at end of a leg. 

 5, a single silk-tube. After Emerton. 



Fig. 305ft. Structure of a centipede. A, Lithobius americanus, natural size. 

 B, underside of head and first two body -segments and legs, enlarged: ant, an- 

 tenna: 1. jaw; 2, first accessory jaw; c, lingua; 3, second accessory jaw and 

 palpus; 4, poison-jaw. (Kingsley del.) C, side view of head (after Newport): 

 ep, epicranium; I, frontal plate; sc, scute; p, first leg; sp, spiracle. 



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