PODOPLEA AMPHARTHRANDRIA 



6S 



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 



^ct 



Mess. en. 



-Ant 2 



AnU..^ 



En.-^h 



Mei 



ch.. 



-Ant.2. 



■Abd 



.-Th. 



B C 



Fig. 32. — Later stages iii the development of Haemoccra danae. Abd, AbdonieD ; 

 Ant.l, Ant.^, 1st aud 2iid antennae ; ch, chitinous investment ; e, eye ; J^ct, ecto- 

 derm ; £n, endoderm ; 3fes, mesoderm ; Ales th en, mesoderm and endoderni ; R, 

 rostrum ; St, mouth and stomach ; Th, 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 F 



