PLATE 75. 

 All figures are of Stomoloplius meleagris. 



Fig. i. Mature medusa, 0.66 natural size. In the ocean off Fernandina, 



Florida, January 3, 1905. 

 Fig. 2. Young medusa, 1.5 times natural size. Charleston Harbor, South 



Carolina, August 28, 1897. 



Fig. 2'. Sagittal section of the medusa shown in figure 2. 

 Fig. 2". Cross-section of the fused mouth-arms of the medusa shown in 



figure 2, cut at the level of the 16 scapulets. 

 Fig. 2'". Marginal sense-organ of the medusa shown in figure 2, showing 



the exumbrella pit above the sense-organ. There is no ocellus. 

 Fig. 3. Young medusa, 5.5 mm. long and 3 mm. in diameter, showing the 



lateral mouths (scapulet mouths) beginning to break through the 



walls of the primitive oesophagus. Charleston Harbor, South 



Carolina, September 9, 1898. An oral view of this medusa is 



shown in figure I, plate 76. 



Drawn from life, by the author. 



