184 THE ROYAL SOCIETY OF CANADA 



Gonosome. — Gonangia borne on the upper sides of the branches, 

 obovate, without collar, aperture large, surface smooth. 



Distribution.— Albatross Station 2864, N. 48° 22', W. 122° 51', 

 40 fathoms, Station 2866, N. 48° 09', W. 125° 03', 171 fathoms, Station 

 3465 N. 48° 21', W. 123° 14', 48 fathoms, Puget Sound (Nutting); 

 Queen Charlotte Is., (Fraser); off C. Edenshaw, off Massett, off Rose 

 Spit; Swiftsure Shoal, Friday Harbor. 



Genus DICTYOCLADIUM 



Trophosome. — "Colony flabellate in form. Branches anastomos- 

 ing and forming a widely reticulate structure or network. Hydro- 

 thecae on more than two sides of the stem. Aperture without con- 

 spicuous teeth, operculum variable" (Nutting). 



Gonosome. — "Gonangia borne in the bifurcations of the branches 

 and marked with annular rugosités" (Nutting). 



Dictyocladium flabellum Nutting 



PI. XXVII, Fig. 101 



Dictyocladium flabellum Nutting, American Hydroids, pt. 2, 1004, 



p. 105. 

 Dictyocladium flabellum Fraser, West Coast Hydroids, 1911, p. 63. 



Trophosome. — "Colony flabellate in form, attaining a height of 

 about 4 inches and branching in a strictly dichotomous manner; few 

 evident internodes on stem or branches; the only annulations or con- 

 strictions ordinarily being those at the origin of branches or branch- 

 lets. Branches straight not rlexuose, themselves dichotomously 

 branching in the same plane, the ultimate branches often anastomosing 

 with other branches, forming a rude reticulate pattern. Hydro- 

 thecae arranged in four longitudinal series on stem and branches, so 

 as to form an ascending spiral, tubular, about the distal one-third 

 free, curved gently outward, margin irregular, but usually with a 

 quadrilateral outline, with the corners of the outline very slightly 

 if at all produced into four very low, obscure teeth; operculum with 

 four flaps" (Nutting). 



Gonosome. — "Gonangia borne in bifurcations of the branches, 

 very large, ovate, body with shallow, broad, obscure annulations; 

 neck in the form of a long truncated cone, with a round terminal 

 aperture" (Nutting). 



Distribution.— Albatross Station 2874, N. 48° 30', W. 124° 57', 

 27 fathoms (Nutting). 



I have no specimens of this species. The description and the 

 figures are from Nutting. 



