112 THE ROYAL SOCIETY OF CANADA 



indication that the medusa.' of C. minor and C. chevalense are sufficiently 

 similar to that of T. nutricula to be placed in the same genus. In 

 this way we should have Corydendrium parasiticum and possibly C. 

 corrugatum but Turritopsis minor and T. chevalense. 



I have been unable to find the gonosome of a species that seems 

 rather common in this region and consequently am unable to state 

 definitely to which genus it belongs. It is placed temporarily with 

 the genus Corydendrium but when the gonosome is obtained a change 

 may be necessary. 



? Corydendrium fruticosum new species 



PI. II, Fig. 2 



Trophosome. — Colony consisting of a short, thick, much fascicled 

 stem, which gives rise to a tuft of rather long branches of nearly the 

 same length, up to 3 cm. These branches seldom give off other 

 branches but pass out almost straight, fascicled more or less through- 

 out and decreasing very little in size. The hydranths, which are 

 supported on short pedicels, usually come off in nearly opposite 

 pairs, but sometimes they are found singly. These pairs are seldom 

 far apart but become more crowded distally. The thick perisarc 

 forms a heavy tube around the pedicel of the hydranth so that the 

 end of it is very noticeable. The hydranth when fully developed 

 is of large size and is provided with 12-15 tentacles that have no 

 very definite arrangement. 



Gonosome. — Unknown. 



Color. — There is no distinctly marked color in the stem and even 

 the hydranths are very pale although there is a slight indication of 

 pink or flesh color. 



Distribution. — Most abundant in material obtained in 40-60 

 fathoms outside of Brown Island, Friday Harbor, but also found near 

 Snake I and in Northumberland Channel in 20-30 fathoms. 



Family Corynidae 



Trophosome. — Colony branched or unbranched. 1 lydranths club- 

 shaped with scattered capitate tentacles. 



Gonosome. — Gonophores producing fixed sporosae>. 



Genus CORYNE 



Trophosome. — Colony branched or unbranched. Hydrorhiza 

 of creeping filiform tubes and the stems and branches invested with 

 a thick perisarc. Hydranths club-shaped with scattered capitate 

 tentacles. 



