Plate 16. 



Fig. 1. Pegantha laevis, sp. nov., type ; side view, from life. X 2. 



Fig. 2. Cnuoctantha tenella, sp. nov. ; immature individual, 2 mm. in diameter, in 



which there is as yet only one otocyst per marginal lappet. 

 Fig. 3. Pegantha triloba; immature individual, 2.5 mm. in diameter, with seven 



antimeres. 

 Fig. 4. Aegina species (?); immature individual, 5.5 mm. in diameter (see p. 74). This 



figure is incorrect as it does not show the interradial septa which are present in 



three of the four quadrants and separate the gastric pouches. 

 Fig. 5. Solmissus marshalli. In the lower half of the drawing the marginal zone is 



dissected away to show the form of the gastric pockets. Only the basal 



portions of the tentacles are shown. Natural size. 

 Fig. 6. Solmissus marshalli ; immature individual, 28 mm. in diameter, with only eight 



antimeres. 



