The common garden spider (Epeira): a, leg; 6, maxillary palpus; 
c, poison-jaws; e, spinnerets. 2. Front view of head with the eight simple 
eyes and the poison -jaws. 3. End of 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. 
Structure of a centipede. A, Lithobius americanus, natural size, 
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, spiracle. 
(To fffLce page 110.) 
