WEST COAST HYDEOIDS 43 



fCAMPAXULIXA FOESKALEA Peron et Lesueiir 

 PI. Ill, Figs. 11-13. 



jEqnorea forskaJea Peron et Lesueur. Ann. Mus. Nat. Hist., Tome 1-1, 

 1809, p. 336. 



Mquorea vitrina 'Wright, Jour. Micr. Sc, Vol. Ill, New Series, p. 45. 



Zygodactyla vitrina HixcKS, British Hydroid Zoophytes, 1S68, p. 192. 



Trophosome. — Stem imhranched or slightly branched. Hydro- 

 thecffi oval or oblong, contracting abruptly at the base, so that 

 the base forms almost a right angle with the side, terminating 

 above in about 12 converging segments. Hydranths with 12 

 tentacles. 



Gonosome unknown. 



Distribution. — San Juan Archipelago. 



Dr. T. S. Wright, having secured specimens of the medusa 

 JEquorea vitrina Gosse, succeeded in hatching the ova, and con- 

 tinuing the development until hydroids were produced, these 

 corresponding in character to a species of Campanulina. Hincks 

 refers to this but calls the species Zygodactyla vitrina. Neither 

 before nor since, as far as I can make out, has this hydroid been 

 reported as appearing in its own habitat, though the medusa is 

 found widely distributed, at least we must believe so if we are to 

 credit ]\Iayer who has recently produced a large two volume mon- 

 ograph on the Hydromeduss, as under the common name ^^quo- 

 rea forskaJea Peron et Lesueur, he includes those that have been 

 named J^quorea vitrina as well as JEquorca caridcsccns of the 

 Pacific Coast and many others. ^"^ An JEquorea, which in all like- 

 lihood is this same species, is very abundant in the Vancouver 

 Island Region aiid consequently I have very little doubt but that 

 the hydroid I have obtained is of the same species as that reared 

 by Wright from this JEquorca. As such investigators as Nutting 

 and ]\Iayer have given up the idea of an entire coincidence of 

 nomenclature between the hydroids and the hydromedusas in the 

 present state of knowledge. I think it better to use the hydroid 

 generic name Campanulina, than the medusa name JEquorea. 



All the specimens examined with one exception are un- 

 branched; that one had one hydrotheca growing by means of a 

 pedicel from what might be called the main stem and on the op- 

 posite side one seemed to have been broken off. The pedicels 

 were wavy or annulated throughout. They arise from a quite 



16 A. G. Mayer, The Hydromedura^. 1910, p. 325. 



