Ill 



PODOPLEA AMPHARTHRANDRIA 



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 



Jlcl 



,.Ant.2. 



Ant 2 



Abd. 



FIG. 32. Later stages in the development of Jfaenioctra danae. Abd, Abdomen ; 

 Ant.l, Ant. 2, 1st and 2nd antennae ; ch, chitinous investment ; e, eye ; Ect, ecto- 

 derm ; En, endoderm ; Mcs, mescderm ; Mes <L- en, mesoderm and endoderm ; R, 

 rostrum ; St, mouth and stomach ; Tk, thoracic appendages. (After Malaquiu. ) 



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 F 



