111 PODOPLEA—-AMPHARTHRANDRIA 65 
vessel. As the Nauplius migrates, apparently by amoeboid 
movements of the whole body, it loses all its appendages, the eye 
degenerates, and the body is reduced to a minute ovoid mass of 
Fic. 32.—Later stages in the development of Haemocera danae. Abd, Abdomen ; 
Ant.1, Ant.2, 1st and 2nd antennae ; ch, chitinous investment ; e, eye ; Het, ecto- 
derm ; Hn, endoderm ; Mes, mesoderm ; Mes d&: en, mesoderm and endoderm ; &, 
rostrum ; Sé, mouth and stomach ; 7h, thoracic appendages. (After Malaquin. ) 
cells, representing ectoderm and endo-mesoderm, surrounded by a 
chitinous membrane (Fig. 32, A). Arrived in the ventral blood- 
vessel it begins to grow, and the first organ formed is a pair of 
fleshy outgrowths representing the second: antennae (Fig. 32, B), 
which act as a nutrient organ intermediary between host and 
VOL. IV r 
