PLATE 27. 



Fig. I. Dipleurosoma collapsa, young medusa with 4 simple radial-canals. 



Tortugas, Florida. June, 1897. 

 Fig. 2. Dipleurosoma collapsa, half-grown medusa with 16 simple, separate, 



radial-canals. 

 Fig. 3. Dipleurosoma collapsa, mature female, with 16 radial-canals grouped 



into clusters of 4 canals each. Tortugas, Florida, July, 1898. 

 Figs. 4 and 5. N etocertoides brachiatum. Successive stages in the growth of 



the medusa. Tortugas, Florida; and Nassau, Bahamas, July, 



1898 and 1903. 



Fig. 6. N etocertoides braclnatum. Oral view of medusa shown in figure 4. 

 Fig. 7. Dipleurosoma collapsa. Aboral view of the stomach showing the 



grouping of the radial-canals into 4 radial clusters ot 4 canals 



each. Tortugas, Florida. 



Fig. 8. Turris superba. Aboral view of the stomach showing the inter- 

 radial positions of the gonads. 



See page 126 for description of figure 8. 

 Drawn from lite, by the author. 



