PLATE VI. 

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



flG. I. Cfy/ia caiiaiiaia {H\nck&). Single hydrotheca (enlarged). 



2. Another hydrotheca (enlarged). 



3. Clytia compressa (Clark). Hydrothecs (enlarged) showing different 

 degrees of thickening of the hydrothecal walls. 



4. Single gonangium (enlarged). 



5. Camfanulafia ritteri"iintt.\ng. Part of colony (enlarged). 



[198] (2l6) 



