3 2 DISCOVERY REPORTS 



Calycophorae have made progress from an evolutionary point of view by freeing the segmentally 

 repeated groups of gastrozooids, bracts and gonophores, in the form of eudoxids. In some cases one 

 of the gonophores loses its manubrium and becomes an organ for jet-propulsion, the special nectophore. 

 Bracts are found in larval Physonectae, and in the adult Physonectae they reach the peak of their 

 development, being present in several ventro-lateral rows on the stem. They are not found in larval 

 Calycophorae, unless their canals are represented by the somatocyst. In adult Calycophorae, as stated 

 above, there is only one bract to each gastrozooid, and it eventually becomes the protective part of the 

 free eudoxid. 



