PLATE 21. 



Fig. I. Proboscidactyla ornata var. gemmifera, showing a budding medusa 

 about to be set free. Tortugas, Florida, June, 1897. 



Fig. 2. ProkosfiJtiftvln or tint a var. gemmifera, showing unusually dark 

 pigment in the tentacle-bulbs. Beaufort, North Carolina, No- 

 vember 21, 1904. 



Fig. 3. Proboscidactyla ornnta var. gemmifera, showing small immature 

 medusa buds at the 4 radial angles of the stomach. Tortugas, 

 Florida, June 12, 1897. 



Fig. 4. LaoJicea cruciatu ("calcarata"), young medusa. Agassiz Labora- 

 tory, Newport, Rhode Island. 



Fit;. 5. Laodicea cruciatn ("calcarata"}, half-grown male medusa. Agassiz 

 Laboratory, Newport, Rhode Island, September 17, 1896. 



Drawn from life, by the author. 



