PLATE 6 
Platygaster vernalis 
A. —Section of a polyblastula 23 days old located in the chyle of the mid¬ 
intestine of the host. Portions of seven of the eight blastulas which compose 
this parasite body are shown. Two of the blastulas are cut through the center. 
This parasite body has assumed an elongate shape and now measures about 
one-fourth the length of the mid-intestine of the host. The paranuclear masses 
are shown at each end. The periphery of the drawing represents the epithelium 
of the mid-intestine, the lighter stippled area the chyle of the mid-intestine. 
X275. 
B. —Longitudinal section through a polyembryonal mass about 26 days after 
the original egg was deposited, showing portions of six embryos. About this 
time the embryos are forming the germ layers and organs of the young laryae 
and are somewhat Gothic-like-shaped. Note that the trophamnion is less dense, 
and that the paranuclear masses are no longer so conspicuous. X200. 
