[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION 133 



Trophosome. — Stems usually unbranched but occasionally one 

 branch also giving rise to a hydrotheca appears, growing from a stolon 

 which is not annulated to any extent. The stem or pedicel of the 

 hydranth varies much in length and the amount of annulation. Usu- 

 ally there are several annulations at the base and fewer at the distal 

 end below the hydrotheca. Hydrotheca deeply campanulate, taper- 

 ing very gradually from margin to base. Teeth deep, acute, about 

 15 in number. 



Gonosome. — There is no gonosome in any of my specimens but I 

 have seen it in Prof. Nutting's specimens and I believe he has de- 

 scribed it in his monograph of the Campanularidse, not yet published. 

 It is sufficient to say here, that there is no doubt as to its belonging to 

 the genus Campanularia. 



Distribution. — Departure Bay, San Juan Archipelago (Fraser) ; 

 near Round I. in Dodds Narrows, off Matia I. 



In connection with this species in my West Coast paper, I referred 

 to the resemblance between it and the unbranched specimens of 

 Clytia edwardsi (Nutting). At that time I was not convinced that there 

 were two distinct species. Later I saw the gonosome in some of Prof. 

 Nutting's specimens and as it was distinctly campanularian, it cleared 

 up any doubt there was in the matter. There is much resemblance 

 between the hydrothecae of the two but that of C. denticulata is usually 

 much smaller. 



Campanularia everta Clark 

 PI. X, Fig. 26 



Campanularia everta Clark, Hyd. of the Pacific Coast, 1876, p. 253. 

 Campanularia everta Torrey, Hyd. of the Pacific Coast, 1902, p. 51. 

 Eucopella everta Fraser, West Coast Hydroids, 1911, p. 37. 



Trophosome. — Stems unbranched, arising from a reticulated 

 stolon; pedicels irregularly annulated or wavy throughout with a 

 distinct double annulation below the hydrotheca, hydrotheca very 

 variable; the wall may be quite thick or comparatively thin but even 

 at the thinnest it is thicker than that of the majority of the cam- 

 panularians; the margin is sometimes strongly everted and at other 

 times not everted in the least; the margin may be perfectly even, 

 slightly crenulated or distinctly wavy. 



Gonosome. — Gonangia borne on the stolon by means of short 

 pedicels that may have one or two annulations; the male gonangia 

 are smaller than the female but are of the same shape, broadly oval 

 in one plane and more oblong in the other; surface smooth or with 

 large shallow corrugations ; distal end rather truncate with the opening 



