188 THE ROYAL SOCIETY OF CANADA 



seldom perfectly in line; hydrothecœ immersed, tubular, with distal 

 ends constricted; margin entire, oval; operculum of one abcauline 

 flap. 



Gonosome. — Unknown. 



Distribution. — San Juan Archipelago (Fraser); off O'Neale I. 



Selaginopsis mirabilis (Verrill) 



PI. XXVIII. Fig, 106 



Diphasia mirabilis Verrill, Amer. Jour. Sc, 3d. sew, V. 1872, p. 9. 

 Selaginopsis mirabilis Fraser, West Coast Hydroids, 1911, p. 66. 



Trophosome. — Stem stout with regular pinnate branching, slightly 

 geniculate in the branched portion; hydrothecœ in two rows on the 

 stem but in six rows on the branches, distal portion of the hydrotheca 

 free and turned out from the stem; margin oval, with two lateral 

 teeth; operculum of two flaps. 



Gonosome. — Gonangia oval, not constricted to form a distinct 

 neck; aperture large, circular; surface smooth; a distinct pedicel 

 is present. 



Distribution.— Puget Sound, Albatross Station 2865, N. 48° 12', 

 W. 122° 49', 40 fathoms (Nutting); San Juan Archipelago, Dodds 

 Narrows, (Fraser); off Massett, Northumberland Channel, Pylades 

 Channel, Gabriola Pass, Ruxton Passage, off Matia I., Friday Harbor, 

 off Brown I. Deer Harbcr, Upright Channel, Griffin Bay, off Waldron 

 I., off O'Neale I., off Blakely I., Puget Sound. 



Selaginopsis pinnata Mereschkowsky 



PI. XXVIII, Fig. 107 



Selaginopsis pinnata Mereschkowsky, Ann. and Mag. N.H., 5th. 



ser., 2, 1878, p. 436. 

 Selaginopsis pinnata Fraser, West Coast Hydroids, 1911, p. 66. 



Trophosome. — Stem stout, woody, with deeply cut nodes; branches 

 not regularly alternate; they vary from alternate to opposite; 

 hydrothecœ in two rows on the stem and four very regular rows on 

 the branches, not so closely crowded as in some of the other species, 

 tubular but short and stout, with oval aperture; operculum of one 

 abcauline flap. 



Gonosome. — Unknown. 



Distribution. — San Juan Archipelago, Queen Charlotte Is. (Fra- 

 ser) ; off Rose Spit, Alert Bay. 



