140 THE ROYAL SOCIETY OF CANADA 



veloped. 19 To bear this out he gives a figure showing the hydrotheca 

 and the gonangium of C. magnified. 



The figure given here is the one previously used, drawn from one 

 of Clark's specimens from Shumagin Is. I have not found any gon- 

 angia in my own material and the specimens obtained are not so large 

 as the Alaska specimens. 



Campanularia urceolata Clark 



PI. XII, Fig. 36 



Campanularia urceolata Clark, Alaskan Hydroids, 1876, p. 215 

 Campanularia urceolata Torrey, Hyd. of Pacific Coast, 1902, p. 54. 

 Campanularia urceolata Fraser, West Coast Hydroids, 1911, p. 33. 



Trophosome. — Stems unbranched serving as pedicels, arising from 

 a stolon that is usually smooth when attached to a surface (usually 

 of other hydroids) but strongly annulated when it is free; pedicels 

 varying much in length, usually annulated or wavy throughout; 

 hydrothecse very variable in size, shape and nature of margin; they 

 may be tubular, urceolate, or turgid towards the base; the margin 

 has 12-18 teeth, usually shallow and blunt; reduplication of the 

 margin often takes place. These variations account for the various 

 synonyms, turgida, cylindrica, and reduplicata, being used. 



Gonosome. — Female gonangia bottle-shaped with long neck; 

 surface wavy or slightly corrugated; attached to stolon with very 

 short annulated pedicels; there appears to be but one sporosac 

 present containing 7 or 8 ova. The male gonangia are short, not 

 much longer than wide and without the bottle neck; the sinuosities 

 are more deeply cut and that gives the gonangium an irregular shape. 



Distribution. — Bare Island (Hartlaub) ; Queen Charlotte Is., 

 Dodds Narrows, San Juan Archipelago (Fraser); found in almost 

 every locality in which dredging has been done from Queen Charlotte 

 Is. to Puget Sound, both east and west coasts of the Island. It grows 

 on a great number of other hydroids and may be also found on worm 

 tubes, etc. 



Torrey has given several figures to show the amount of variation 

 in the shape of the hydrotheca in this species. 



Campanularia verticillata (Linnaeus) 



PI. XIII, Fig. 37 



Sertidaria verticillata Linnaeus, Syst. Nat., 1758, p. 811. 

 Campanularia circula Clark, Alaskan Hydroids, 1876, p. 213. 



19 Coelentérés du Fond, 1912, p. 18. 



