PLATE IX. 



[Proc. Wash. Acad. Sci., Vol. Ill, PI. XX.] 



Fig. 1. Obeli'a dudia T^utting. Part of colony (enlarged). 



2. Gonothyra^a inornata Nutting. Part of colony, showing hydrothecae 



and gonangium (enlarged). 

 3 and 4. Gonangia (enlarged). 

 [204] (22a) 



