Plate 36. 



Figs. 1 and 1". Phialucium Carolina. Figure 1', part of bell-margin; 

 figure 1", side view of manubrium and radial-canal. Charleston 

 Harbor, South Carolina, September, 1897. 



Figs. 2 to 2'". Blackfordia manhattensis. Figure 2', part of the bell-margin, 

 showing the projections from the tentacle-bulbs extending into 

 the gelatinous substance of the bell; figure 2", lithocyst; figure 

 2'", portion of gonad. Off Sandy Hook, New York Harbor, 

 October 16, 1904. See page 277. 



Fig. 3. Blackfordia virginica. Aboral view looking down upon the manu- 

 brium of a male medusa. See page 277. 



Fig 4. Blackfordia virginica. Part of the bell-margin showing the ento- 

 dermal diverticula of the tentacle-bulbs which penetrate into the 

 gelatinous substance of the bell. 



Fig. 5. Blackfordia virginica. Gonad and manubrium of a mature female. 

 Norfolk Harbor, Virginia, November 7, 1904. 



Fig. 6. Eucheilota duodccimalis. Agassiz. Laboratory, Newport, Rhode 

 Island, August 8, 1892. See page 283. 



Fig. 7. Pseudochtia pcntata. Oral view of the manubrium showing the 5 lips 

 72 apart. See page 278. 



Drawn from life, by the author. 



