Fi». 96o.— 1. The common garden spider (Epeira): a, leg; b, maxillary palpus; 

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

 eyes and the poison-jaws. 3. End o( a jaw: a, outlet of the poison-canal. 7. 

 Palpus of female; 8, of male spider. 6. Spines and claws at end of a leg. 

 4. Spinnerets, highly magnified. 5. A single silk-tube.— After Emerton. 



Fig. 97o.— Structure of a centipede. A, Lithobius americantts, natural size. 

 B, under side of head and first two body-segments and legs, enlarged: ant, 

 antenna; 1. jaws; 2. first accessory jaw; c, lingua; 3, second accessory jaw 

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

 port): ep, epicranium; 2, frontal plate; sc, scute; p, first leg; sp,*spiracla 



iTo face vaae 90,) 



