This Report was completed early in 1913, and was placed in the hands 

 of the printer in Sydney in June of that year. My paper entitled 

 "Further Notes on Australian Hydroids, II.", was printed in the 

 Proceedings of the Royal Society of Victoria in September, and in one or 

 two passages in that paper reference was made to certain species described 

 in the Report, which it was then expected would be published first. . 



During the delay in the printing-house, Dr. Billard, in his Report on 

 the Plumulariidse of the "Siboga" Expedition, has forestalled my use of the 

 specific name "intermedia" for a species of Halicornaria, rendering neces- 

 sary the cancellation of the species so named in this Report. The species, 

 however, was a very doubtful one, and in preference to establishing 

 another specific name, I propose to retain the name intermedia, but 

 treating the Hydroid as a variety of H.furcata, until more is known of 

 the affinities of the two forms. 



ERRATA. 

 Page 16, sixth line from bottom, for "p. 459" read "p. 463." 

 „ 53, line 25, for "fig. 4" read "figs. 3-4." 



— W. M. B. 



