Fig. 305b,—Structure of a centipede. A, Lithobius americanus, natural size. 
B, under side of head and first two body-segments and legs, enlarged: ant, an- 
tenna; 1, jaw; 2, first accessory jem lingua; 8, second accessory jaw and 
palpus; 4, poison-jaw. (Kingsley del.) C, side view of head (after Newport): 
ep, epicranium; 1, frontal plate; sc, scute; p, first leg; sp, spiracle. 
{To face page 339.] 
