170 THE ROYAL SOCIETY OF CANADA 



Halecium Washington* Nutting, Am. Naturalist, XXXV, 1901, p. 789. 

 Halecium nuttingi Torrey, Hyd. of the Pacific Coast, 1902, p. 50. 

 Halecium washingtoni Fraser, West Coast Hydroids, 1911, p. 50. 



Trophosome. — Stem and larger branches fascicled but not so 

 stout as some of the other fascicled stems of this genus; primary 

 branches irregular, secondary branches less so with an alternate 

 arrangement; internodes long, annulated proximally with at least 

 two, often more, annulations, these usually oblique; the ultimate 

 branches are bent at the nodes to give a zigzag appearance; pedicels 

 usually annulated at the base; hydrophores with rim everted, hy- 

 dranths large. 



Gonosome. — "Gonangia borne singly in the axils of the branches 

 and branchlets, regularly ovoid in one view, barnacle-shaped in the 

 other; aperture large, terminal. The appearance of some of them 

 would indicate the possible presence of an acrocyst at a later stage 

 of development" (Nutting). 



Distribution. — Puget Sound (Nutting); Dodds Narrows, San 

 Juan Archipelago (Fraser); Northumberland Channel, Gabriola Pass, 

 Friday Harbor. 



-There were no gonangia on specimens obtained. The drawing 

 and description are after Nutting's original. 



Halecium wilsoni Calkins 

 PI. XXII, Fig. 81 



Halecium wilsoni Calkins, Hyd. of Puget Sound, 1899, p. 343. 

 Halecium wilsoni Fraser, West Coast Hydroids, 1911, p. 49. 



Trophosome. — Stem fascicled but slender and delicate; main 

 branches few irregularly arranged; branchlets numerous, short and 

 slender; the internodes are of uniform length, 1-3 annulations at each 

 node; hydrophore with slightly everted margin. 



Gonosome. — Male and female gonophores similar in shape but 

 with the female smaller than the male, disk-shaped with the opening 

 at the distal end; the blastostyle is very distinctly branched; the 

 sporosacs are extruded into an acrocyst; irregularly situated near the 

 base of the main branches of branchlets. 



Distribution. — Bremerton (Calkins); Bare Island (Hartlaub); 

 Ueluelet, San Juan Archipelago (Fraser); Clarke Rock, Nanoose Bay, 

 north of Gabriola Island, Northumberland Channel, Gabriola Reefs, 

 off Matia I., Friday Harbor. 



Genus OPHIODES 



Trophosome. — As in the family; tentacular organs present. 

 Gonosome. — Gonophores producing fixed sporosacs. 



