PLATE 6. 



Figs, i and i'. Hydroid of Ectopleura Jumortieri. Dredged from a depth 



of 5 fathoms in Newport Harbor, Rhode Island, August, 1896. 



Figure I, enlarged view; figure i', natural size. 

 Fig. 2. Medusa of Ectopleura dumortteri. Agassiz Laboratory, Newport, 



Rhode Island, July, 1892. 



Fig. 3. Sarsia angulata. Turks Islands, Bahamas, January 2O, 1893. 

 Fig. 4. Protiara formosa, male. Nassau Harbor, Bahamas, June, 1903. 

 Fig. 5. Protiara formosa, female. Tortugas, Florida, June IO, 1897. 

 Fig. 6. Protiara formosa, young medusa. Turks Islands, Bahamas, January 



20, 1893. 

 Fig. 7. Zanclea gemmosa. Manubrium of the medusa shown in figure 5, 



plate 7. 



Drawn from life, by the author. 



