DESCRIPTION OF PLATES 



Abbreviations. 



amp. = ampulla. sp. = spine. spo. == sponge. dac. = dactylozooid. st. = style. dac. p. = dactylopore. 

 gast. p. = gastropore. y. gast. = young gastropore. gast. se. == gastropore scale. coen. p. = pore of the 

 coenosarc canal system. n. cyc. = new cyclosystem. nem. = nematophore. 



