PLATE IV. 



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



.. I. Garveia annulata Nutting. Part of colon}', showing hydranths and 

 gonophores. 



2. Single hydranth, showing pseudo-hydrotheca (enlarged). 



3. Eiidendrium vaginatum AUman. P.irt of colony, showing hydranths 

 and gonophores. 



4. Single hydranth, showing pseudo-hydrotheca (enlarged). 



5. Cluster of female gonophores. 



6. Single gonophore, with expanded chitinous collar (enlarged). 

 [194] (212) 



