ii Contents. 



Lafoeidae (Lofoea) - 59 



Sertulariidae (Sertularella, Sertularia, Thuiaria, Selaginopsis, Hydrall- 

 mania) - - 60 



Plitiiniliniiili.il: (Ai/laojilienia, Antenella, Halicornaria, Plumularia) .... 71 



Bibliography.. 81 



The following species are briefly discussed, in connection with the species 



concerned : 

 Relation of Form and Habit to Environment (Syncoryne mirabilis, p. 31; 



Tubularia crocca, p. 44; Campanularia urceolata, p. 54; Obelia commis- 



suralis, p. 57). 

 Development and Regeneration of Tentacles; Taxonomic Significance 



{Clara leptostyla, p. 30; Hydractinia milleri, p. 35; Corymorpha palma, 



p. 41 ; Tubularia crocea, p. 45) . 

 Orientation [Corymorpha palma, p. 39; Sertularia fwcata, p. 66; .S'. 



argentea, p. 68) . 

 Response to Tactual Stimulation (Corymorpha palma, p. 41). 

 Origin of Branches and Gonothecae within Hydrothecae {Sertularella tleuti- 



fera, p. (>1 : S. haledna, ]>. 62; Plumularia goodei, p. 7(>l. 

 Haleciid with Free Medusa (Camjialteium iiieilusi/erum,, p. 48). 



