220 THE ROYAL SOCIETY OF CANADA 



Ophiodes carchesium 1 new species 

 Fig. la and lb. 



Trophosome. — Sub-sessile hydrophores grow directly from a 

 loosely-reticulate stolon, which shows no sign of division into inter- 

 nodes. The hydrophores are large and more campanulate than is 

 usual in the Halecidœ. Below the hydrophore there is a sharp con- 

 striction which separates the hydrophore from the basal support, 

 which is too short to be properly called a pedicel. The hydranth is 

 large, much greater in diameter than the width of the hydrophore; 

 tentacles 10-12. Tentacular organs appear at intervals along the 

 stolon; the terminal bulb is about twice the diameter of the chitinous 

 cup that surrounds the stalk of the organ. 



Gonosome. — Unknown . 



Distribution. — Forming a net work over a branching bryozoan 

 colony. 



The absence of a regular stem and the shape of the hydrophore 

 readily distinguishes this from other species of Ophiodes. 



Family lafœim; 

 Filellum serpens (Hassell) 



Campanularia serpens Hassell, Trans. Micr. Soc, III, 1852, p. 163 

 Filellum serpens Fraser, West Coast Hydroids, 1911, p. 50. 



This species occurs in abundance on nearly every specimen of 

 Abietinaria abietina, the hydrothecae being almost as abundant as the 

 Abietinaria hydrothecae in some cases where the creeping stolon forms 

 a network over the whole stem. Many of the hydranths in various 

 states of contraction are very well preserved. 



Lafœa fruticosa Sars 



Lafœa fruticosa Sars, Norske Hydroider, Vid. Selsk. Forh., 1862, p. 30. 

 Lafœa fruticosa Fraser, West Coast Hydroids, 1911, p. 52. 

 A fine large colony of this species was obtained intact. 



Lafœa gracillima (Alder) 



Campanularia gracillima Alder, Trans. Tynes. Field Club, 1857; p. 39. 

 Lafœa gracillima Fraser, West Coast Hydroids, 1911, p. 52. 



Several small colonies, apparently young, were found on Abietin- 

 aria and Lafœa. No large colonie s were obtained. 



1 Carchesium, a goblet. Suggested by Dr. Willey as referring to the shape of 

 the hydrophore and support. 



