[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION loi 



ing crab appeared on which were eight species of hydroids belonging 

 to 8 different genera. The species were: — Syncoryne mirabilis, Garveia 

 annulata, Campanularia urceolata, Clytia edwardsi, Gonothyrœa gracilis, 

 Obelia griffini, Halecium parvulum and Plumidaria corrugata, as 

 representative a lot as one could well imagine. 



While the descriptions throughout are concise, it has been my 

 endeavor to make them include all the salient features. When they are 

 taken in connection with the figures they should be sufficient to lead 

 to the diagnosis of the majority of specimens. Naturally there will be 

 some intergrading forms as in species of all nearly related groups of 

 animals and plants in which the diagnosis will be largely a matter of 

 individual opinion. 



The enlarged drawings, which, as in my other papers, have been 

 made by my wife, are all made to the same scale unless otherwise 

 indicated and for that reason, unless in exceptional cases, comparative 

 measurements have been considered unnecessary. As in some cases 

 the general appearance, more than anything else, serves to distinguish 

 nearly allied species, it has been thought advisable to include sketches 

 to show the natural size of a specimen, or a part of it, of each species. 

 Since these are freehand they are naturally not so exact as the camera- 

 lucida drawings but nevertheless they may be of some service in 

 diagnosis. 



To all those mentioned as having given valuable assistance I 

 wish to express my sincere thanks. 



GEOGRAPHIC DISTRIBUTION 



A lengthy discussion of distribution in this paper is scarcely 

 necessary as in the West Coast paper distribution was given much 

 attention and, as the whole coast was considered, a greater number of 

 species was included in the discussion than are described in the pre- 

 sent paper. 



Further investigation has corroborated the majority of the con- 

 clusions then set forth. A word regarding the species now reported 

 from this region for the first time will be sufficient to indicate this. 

 Of the 28 species that come under this head, 7 are described as new. 

 These are: — Corydendrium fruticosum, Cor y ne crassa, Campanularia 

 longitheca, Obelia multidentata, Ophiodes gracilis, Thuiaria distans and 

 Cladocarpus Vancouver ensis. Of the remainder, 10 have been re- 

 ported from other points along the west coast, three of them, Euden- 

 drium, rameum, Selaginopsis triserialis and Sertularella pedrensis, from 

 points south of this region, and the remainder, Tubularia indivisa, 

 Campanularia regia, Gonothyrœa inornata, Stegopoma plicatile, Hale- 



