198 LAFOEID^. 



pedicels having the same diameter as the stem, and spring- 

 ing alternately from the bends ; GONOTHEC^: large, cylin- 

 drical, with the lower end conical, and the upper broad 

 and truncated, containing a single zooid. 



POLYPITES very extensile, with 16 or 18 tentacula. 



GONOZOOID. See the description under the generic cha- 

 racter. 



THE tentacles of the gonozooid have the thread-cells uni- 

 formly distributed over the surface, showing no tendency 

 to an arrangement in distinct groups. 



Hub. On the fronds of Laminaria digitata, from about 3 

 fathoms water, off the town of Stromness (G. J. A.). 



Family IV. Lafoeidae. 



HYDROTHEOE tubular ; POLYPITES cylindrical, with a coni- 

 cal proboscis. 



Genus LAFOEA, Lamouroux. 



Der. Named after M. de Lafoye, a botanist and Professor of Matheinaties 

 in the College of Aler^on. 



CALICELLA, Hincks (in part). 



GENERIC CHARACTER. Stem a simple, creeping, tubular 

 fibre, or erect and composed of many tubes aggregated to- 

 gether, rooted by a filiform stolon; hydrothecae tubular, 

 sessile or with a short pedicel, without an operculum, more 

 or less regularly disposed on the stem and branches ; poly- 

 plies cylindrical, with a conical proboscis. 



Reproduction unknown. 



THE section of Johnston's Campanularia including the 

 smaller species with tubular and somewhat densely cor- 



