76 



DISCOVERY REPORTS 



PRAYIDAE 



HIPPOPODIIDAE 



Nectopyramis 

 diomedeae 



Rosacea 



adult 

 [neotenouS] 



y° ur >9 \ ff-\ | 



larva ' I (I J| 

 \unknowri\ I \ "^r I I 



adult 

 [heteromorpn\ 



full grown 

 larva-not 

 sexually 

 mature 



[caducous] 



ancestral 

 ontogenies 



3 



" 9 



tgg 



Text-fig 34. Phytogeny of Prayids and Hippopodiids, to show the nature and relationship of the nectophore of Nectopyramis 

 diomedeae. In this diagram arrows are used to indicate growth stages, and long links to show how successive somatocysts are 

 budded from their predecessors. A break in these links indicates that the larval nectophore is caducous. 



