PREVIOUS INTERPRETATIONS OF CNIDARIA 



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Fig. 40. Cladogony as a special form of asexual reproduction of 

 thecate hydroids (Fam. Haleciidae). A, Halecium pusillum, a cormus 

 in cladogony. B, cladogonium freely floating. C, young cormus 

 of Halecium sp. developed from a cladogonium on Cystosira (after 



Hadzi). 



the form of budding than in that of a division (Gastroblasta 

 raffaeli. Fig. 38). The buds can appear in various places, 

 even at the manubrium which corresponds to the oral cone of 

 hydropolyps. In the young parasitic and hypogenetic Narco- 

 medusae, budding can occur even at their aboral ends (e.g. in 

 Pegantha, according to Bigelow Fig. 46 D). It must be empha- 

 sized in this connection that, by way of budding, hy drome - 

 dusae only can be developed from hydromedusae (the one 

 supposed exception is still a matter of dispute). 



