PLATE 76. 

 All figures are of Stomolophus meleagris. 



Fig. i. Oral view of a young medusa 3 mm. in diameter. A side view of this 

 medusa is shown in figure 3, plate 75. 



Fig. 2. Sagittal interradial section of mature medusa shown in figure I, plate 

 74. Also cross-sections of the mouth-arm-tube at three different 

 levels, g, gonad; p, subumbrella papilla in the radius of the sub- 

 genital pit; S, stomach cavity; sg, subgenital pit. 



Fig. 3. Oral view of a quadrant of subumbrella, omitting the mouth-parts. 

 The sector AB, shows the canal-system of the subumbrella, and 

 BC two of the 16 sectors of circular muscles. 



Drawn from life, by the author. 



