[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION 157 



Gonosome. — "Gonangia producing bell-shaped medusae, with four 

 radial canals, two to four marginal tentacles and eight lithocysts" 

 (Nutting). 



This description of Nutting's must refer to the medusa at time 

 of liberation from the gonangium as later the radial canals, tentacles 

 and lithocysts are more numerous. 



Key to the species of Campanulina in the V. I. region. 



A. Colony minute: base of hydrotheca forming a right angle with 



the sides C. forskalea 



B. Colony larger; base of hydrotheca little wider than the end of 



the pedicel C. rugosa 



? Campanulina forskalea (Peron et Lesueur) 

 PI. XVII, Fig. 60 



/Equorea forskalea Peron et Lesueur, Ann. Mus. Nat. Hist., tome 14, 



1809, p. 336. 

 Campanulina forskalea Fraser, West Coast Hydroids, 1911, p. 43. 



Trophosome. — Stem unbranched or slightly branched; hydro- 

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

 forms almost a right angle with the sides, terminating above in about 

 12 converging segments; hydranth with 12 tentacles. 



Gonosome. — Unknown. 



Distribution. — San Juan Archipelago (Fraser); near Round I. 

 in Dodds Narrows. 



I have little to add to the description given in the previous paper. 

 For a long time I looked, in vain for other specimens and it may be 

 that I had collected some but as they were so small they were over- 

 looked. Finally on June 18, 1913, I found several specimens in good 

 condition on some small green algae that were dredged in a depth of 

 about 20 fathoms west of Round Island in Dodds Narrows. They 

 were all unbranched and much similar in size. 



The medusa Mquorea may be found in abundance in this locality 

 at almost all times of the year. If this hydroid is developed from 

 that medusa, as it probably is, it should be possible to find plenty 

 of specimens to trace the development but up to the present that has 

 not been the case. 



Campanulina rugosa Nutting 



PI. XVII, Fig. 61 



Campanulina rugosa Nutting, Harriman Hydroids, 1901, p. 176. 

 Campanulina rugosa Fraser, West Coast Hydroids, 1911, p. 44. 



