[fraserI HYDROIDS OF THE VANCOUVER ISLAND REGION 185 



Genus DIPHASIA 



Trophosome. — Hydrothecae in two rows on the stem and branches; 

 operculum of a single adcauline flap. 



Gonosome. — Gonangia marked with spines or lobes, an internal 

 marsupium usually present in the female. 



Specimens described in my West Coast paper as Diphasia clarœ 

 have turned out to be young specimens of Hydrallmania distans 

 Nutting. 



Diphasia pulchra Nutting 



PI. XXVIII, Fig. 102 



Diphasia pulchra Nutting, American Hydroids, pt. 2, 1904, p. 111. 

 Diphasia pulchra Phraser, West Coast Hydroids, 1911, p. 64. 



Trophosome. — Stem slender, somewhat geniculate distally; 

 branches spirally arranged forming a dense bushy tuft, not unlike- 

 that of Thuiaria argentea; hydrothecse alternate, rather distant, 

 long pitcher-shaped, slender; margin with two broad teeth, opposite 

 to each other. 



Gonosome. — I believe the gonosome has not been described and 

 I have no specimens with gonangia but I have seen some collected 

 by Levinsen that have gonangia with an internal marsupium. He 

 will probably give a description later. 



Distribution.— Albatross Station 2863, N. 48° 58', W. 123° 10', 

 67 fathoms (Nutting). 



Genus HYDRALLMANIA 



Trophosome. — Hydrothecae in groups on the side of the stem or 

 branches, their bases in line but the distal ends turned alternately 

 to right and left. Operculum of a single adcauline flap. 



Gonosome. — Gonangia without spines or internal marsupium. 



Hydrallmania distans Nutting 



PI. XXVIII, Fig. 103 



Hydrallmania distans Nutting, Hyd. from Alaska and Paget Sotind, 



1899, p. 746. 

 Hydrallmania distans Fraser, West Coast Hydroids, 1911, p. 65. 



Trophosome. — Stem erect with a large proximal portion free of 

 branches; branching much varied, often distinctly bilateral but at 

 times with branches coming off in all planes. When the colony is 

 bilateral the branches are regularly pinnate and unbranched making 

 the colony look trim, but when the branches come off in all planes, 



