HALECIUM HALECINUM. 65 



The receptacle is tubular and telescopic in 

 appearance. The male and female capsules 

 differ in shape. Hincks* draws attention to 

 the fact (it is well worth personal observation) 

 that in the case of the female capsules of this 

 genus, they are surmounted by two fully 

 developed " select " polypites ; and he cites 

 this as the only case among the Thecaphora in 

 which these are not entirely suppressed. This 

 fact should be carefully noted. In this 

 species the mouth of the capsule projects 

 beyond the ovary. 



Common in the trawl, more especially in 

 rather deep water, but is not of particularly 

 fine growth. 



(d). — Thick floor of chitine. 



(e). — Appearance of tubes on surface. 



In the horizontal cell or tube from which the left hand 

 vertical tube arises, are seen two dots, which probably represent 

 openings in connection with other tubes or cells. The system 

 is practically the same as in Hydractinia and Antennularia 

 ramosa, and others. 



* A History of the British Hydroid Zoophytes. Vol. I. p. 221. 



