AND CEPHALIZATION. 



221 



arate that part of the head-chest which embraces the mouth 

 and eyes from the region behind it. 



The full realization of this process we find in the free and 

 movable head of Insects. They, of all the great division of 

 Articulata, attain to the highest degree of capitalization. 



Fig. 130. 



This figure (fig. 130) of the common Carrion-Beetle will serve 



larger and /I, the smaller pairs of feelers; 1, 2, 3, the ends of the natatory pad- 

 dles; m, the throat; st, the stomach; i, the intestine; a, posterior end of i; e, 

 the single median eye ; h, a heart-like cavity, but not pulsating ; es, the exterior 

 egg-sacs, partially empty ; es 1 , the funiculus which joins es to the body ; eg, the 

 egg ; p, the germinal vesicle of eg. Original. 



Fig. 129. Epeira tri folium. Hentz. Natural size. A " garden spider," seen 

 from above, cr, the cephalothorax ; t, the abdomen ; pi, the feelers, or palpi ; 

 /, A, / a , $, the four pairs of legs. From Hentz. 



Fig. 130. Necrophorus Americanus. Oliv. Slightly magnified. A common 

 Carrion-Beetle, seen from above, e, the antennae or feelers of the head; I, 

 upper jaws; n, feelers of lower jaws; in, iv, upper lip; v, top of the head; 



