REVIEWS. 45 
germ. Fig. 16 B, g, shows the yolk or germ just forming out of 
the nuclei (a) ; and b, the peripheral cells of the blastoderm skin, or 
“amnion.” Fig. 16 C shows the yolk transformed into the embryo 
(g), with the outer layer of blastodermic cells (b). The body of 
the germ is infolded, so that the embryo appears bent on itself. 
Fig. 16 D shows the embryo much farther advanced, with the two 
pairs of lobes (md, rudimentary mandibles; d, rudimentary pad-like 
- organs, seen in a more advanced stage in Æ), and the bilobate tail 
. Fig. 16. 
eS 
Oo 
OGL, 
ee 
ers! 
FSS 
VOY T 
CRUD 
(PAH 
di- 
condition it clings to the inside of its host by means of its hook- 
like jaws (md), moving about like a Cestodes embryo with its 
