PLATE XIX. 



Figs. 1-3. — Azygojilon rostr'aticm. 

 Fig. 1. — Natural size. 



Fig. 2. — Portion of a liydrocladium, magnified ; lateral view. 

 Fig. 3. — Portion of stem mth hydrocladia and gonangia ; front view. 



Figs. 4-6. — Lytocarpus longicornis. 

 Fig. 4. — Natural size. 



Fig. 5. — Portion of hydrocladium ; magnified. 

 Fig. 6. — Portion of a j)rimary pinna, with origins of hydrocladia. 



Figs. 7-9. — Aglaophenia coarctata. 



Fig. 7. — Natural size. 



Fig. 8.— Portion of hydrocladium ; magnified. 



Fig. 9.— Portion of a branch with origins of hydrocladia, showing wedge-shaped inter- 

 nodes. 



