PLATE XII. 



Figs. 1-4. — Aglaophenia acacia. 

 Fig. 1. — Natural size. 



Fig. 2. — Portion of hydrocladiuin, magnified ; lateral view. 

 Fig. 3. — Same ; front view. 

 Fig. 4. — Corbula. 



Figs. 5-8. — Aglaoplienia calamus. 

 Fig. 5. — Natural size. 



Fig. 6. — Portion of hydrocladium, magnified ; lateral view. 

 Fig. 7. — Same ; front view. 

 Fig. 8— Corbula. 



