PLATE IV 



Figs, i, 3, Chelophyes appendiculata. From the surface plankton at 

 Villefranche, x 25. The left hydroecial wing of the separated 

 gonophore lies to the left under the right wing (out of focus). 



Fig. 2, Vogtia glabra. Larva taken at Villefranche by Dr Tregouboff, 

 x 20. For explanation see legend to Text-fig. 33. 



Figs. 4, 5, 8, Forskalia edwardsii. Species with the yellow spot on the 

 velum, showing the helically coiled stem; photographed alive in the 

 laboratory of the Station Zoologique at Villefranche. x |, x \, x\. 



Figs. 6, 7, Rosacea cymbiformis. Photographed alive in the laboratory of 

 the Station Zoologique at Villefranche to show the extended stem 

 and the eudoxids. x $. 



