PLATE 16. 



Figs, i to 3. Podocoryne gracilis. Successive stages in the growth of the 



medusa. Tortugas, Florida, June, 1899. 

 Figs. 4 to 5. Bougainvillia autitninalis, young and mature stages ot the 



medusa. Agassiz Laboratory, Newport, Rhode Island, Septem- 

 ber, 1895 and July, 1896. 

 Fig. 6. Bougainvillia fronJosa, showing planula; upon the sides of the 



stomach. Tortugas, Florida, June, 1897. 

 Fig. 7. Koii^nlnvilliti carolinensis, young medusa. Agassiz Laboratory, 



Newport, Rhode Island, July, 1892. 

 Fig. 8. Bougainvillia carolinensis. Cluster ot marginal tentacles of a 



young medusa from Newport, Rhode Island. 

 Fig. 9. Bougainvillia carolinensis. Oral tentacle of a young medusa from 



Newport, Rhode Island. 



Drawn from life, by the author. 



