434 REVIEWS. 
at only a single spot, and that even then the contact is not real. In 
fact the Nauplius is a larva, and as the insect world seems to touch = 
the worm world when a caterpillar or dipterous larva i us, so the 
Fic. 7. larva of nd mite and the larva 
ig. 7 
of the crab assume a common 
form, though potentially 
divergent. Itis only a parti: il 
view that would unite the 
A 
form or their larv stages, 
f nong insects we do ks 
know the Stylops alone by the 
Sac-like female scarcely more 
highly organized, so far as ex- 
ternals go, than the  Pelto- 
gaster, but consider also the 
active, highly organized, male 
Stylops, a being so widely di- 
vergent in external form from 
its mate, and though the dif- 
ference is only sexual in its nà- 
ture, yet reaching almost as 
far as the difference between 
classes in the animal kingdom. 
Fig. 72 Fig. 75. 


ters; the mouth-parts are dimi to the legs in 
form. The yolk mass (y) lies on the back of the 
animal; h is the head, and m the mouth-parts. 
WO porti e 
Bio bristles; and the d. ve the iiri is square, 
with two bristles s. 
r moulting this skin the animal acquires a pair of jaws and the 
fore and middle pair of foot- jaws; the body is much larger and the front 
Part is greatly enlarged and protected by the shield-like head-thorax. 
Which is now distinct and rounded in form. As the number of feet have 
