HALECIUM SESSILE. 229 



7. H. GENICULATUM, Norman. 



On the Hydrozoa &c. of the Hebrides,' 1 Eeport of the British Assoc. for 

 1866, 196. 



STEM slender, branching, the branches all in the same 

 plane ; branchlets flexuous, bending alternately right and 

 left between the calycles, jointed, the joints consisting of 

 a single stricture or more rarely two; HYDROTIIEC.E 

 borne immediately below the joints, much elongated, 

 simply tubular, fully two-thirds as long as the internodes, 

 constricted near the base ; GONOTHEC.E unknown. 



Height 1| inch. 



THE bent stem, resembling in this respect that of Obetia 

 geniculata, and the very long calycles are the most salient 

 characters. 



Hab, Dredged in deep water in the Minch (A. M. N.). 



8. H. SESSILE, Norman. 



' Oil the Hydrozoa &c. of the Hebrides," Keport of the Erit. Assoc. for 

 1866, 196. 



Plate XLIV. fig. 2. 



STEM slender, irregularly branching, branches not in the 

 same plane; branchlets jointed, the joints consisting of 

 a single stricture; HYDKOTHEC^E alternate, very short, 

 and perfectly sessile, not rising at all separately from the 

 lateral stem-processes, of which they are mere openings, 

 without being raised into a tube ; GONOTHEC.E unknown ; 

 POLYPITES large, very narrow at the base, thence gra- 

 dually expanding to the summit, where they suddenly 

 swell into a wide, campanulate mouth ; tentacles long 

 and slender. 



Height (probably) 1^ inch. 



THE size of the polypites in this species is remarkable. 



