PLATE 2. 



Fig. I. Hybocodon prolifer. Woods Hole, Massachusetts, March 4, 1907. 

 This drawing shows one of the normal aspects of the medusa, 

 with the bell somewhat contracted. When the bell is extended the 

 mouth comes to the level of the velar opening. 



Fig. 2. Hybocodon pendula. Newport, Rhode Island, April 23, 1897. 



Fig. 3. Hybocodon forbesii. Tortugas, Florida, June 26, 1906. 



Fig. 4. Dicodoniurn jeffersoni. Tortugas, Florida. 



Fig. 5. Dicodoniurn floriJana. Tortugas, Florida, June 17, 1897. 



Drawn from life, by the author. 



