126 THE ROYAL SOCIETY OF CANADA 



reaching a height of about 5 mm. The clavate proboscis is capable 

 of very great extension, but it may be contracted until it is little more 

 than a knob. There are 12-20 tentacles in an irregular whorl which 

 under certain conditions of contraction, shows an arrangement into 

 sets of four. 



Gonosome. — Generative zooids shorter and more slender than the 

 nutritive; tentacles fewer in number but never entirely lacking; 

 sporosacs borne very low, about midway between the tentacles and 

 the base of the zooid. They are not so numerous as in H. aggregata, 

 4 being the greatest number noticed on one zooid. Female sporosacs 

 are small with usually but one ovum; male sporosacs larger. 



Other zooids. — "Spiral zooids at the edge of the colony, about as 

 long as the sterile hydranths, but much more slender, the whole 

 structure resembling a very long tentacle." (Torrey). 



Color. — Pink, female sporosacs light orange. 



Distribution. — Port Renfrew (Fraser). 



This species grows in masses on the rocks at low tide where it is 

 washed by the breakers. I have not seen any of the spiral zooids that 

 Torrey has described and as he made no drawings of them I cannot 

 illustrate them. 



Family Tubularidae 



Trophosome. — Colony unbranched or irregular branched; hyd- 

 ranths with a proximal and a distal set of filiform tentacles. 



Gonosome. — Gonophores borne on the hydranth between the two 

 sets of tentacles give rise to actinulae. 



Genus TUBULARIA 



Trophosome. — Colony unbranched or irregularly branched; hy- 

 dranths large; proximal set of tentacles longer than the distal set. 



Gonosome. — Gonophores in clusters, attached by means of stalked 

 peduncles to the body of the hydranth just distal to the proximal 

 tentacles; female gonophores producing actinulae. 



Key to the species of Tubularia in the Vancouver I. region. 



A. Perisarc extensively annulated T. larynx 



B. Perisarc not extensively annulated 



a. Colony irregularly branched T. crocea 



b. Colony unbranched 



1 . Distal tentacles less numerous than proximal . . T. harrimani 



2. Distal tentacles more numerous than proximal . . T. indivisa 



