PLATE 8. 



Fig. 1. Diphyes spiralis. Lateral view of superior nectophore, not contracted {cf. PI. 7, fig. 4), 

 showing the spiral course of the ridges (R. D, R. L). X 20. 



Fig. 2. Ventral view of same, showing spiral ridges, ventral facet, conformation of base, and 

 asymmetrical position of the somatocyst (So). 



Fig. 3. Diphyes contorta. Apical view of superior nectophore. X 12. 



Fig. 4. Diphyes fowleri. Lateral view of superior nectophore, showing short hydroecium (H) 

 and transverse position of the pear-shaped somatocyst. X 8. 



Fig. 5. Muggiaea atlantica. Lateral view of apex of nectophore, to show the ridges (R. D, R L, 

 R. V, R. V2). 



Fig. 6. Diphyes bojani. Oblique dorsal view of apex of superior nectophore of a specimen in 

 which the ridges are extended into wing-like enlargements. 



Fig. 7. Diphyes appendiculata. Dorsal view of apex of superior nectophore, showing origin of 

 ridges. 



Fig. 8. Diphyes appendiculata. Oblique dorsal view of superior nectophore to show course and 

 extent of lateral and dorsal ridges (R. L', R. L^, R. D). X about 6. 



Fig. 9. Chuniphyes inultidentata. Lateral view of colony with the two nectophores still con- 

 nected. X 5. 



