/ 

 HYDROIDS OF BEAUFORT, NORTH CAROLINA. 369 



Halecium tenellum Hincks. 



Halecium tenellum Hincks, Ann. and Mag. N. H., 3d ser., 8, 1861. p. 252. Hincks, Br. Hydroid Zoophj'tes, 1868, p. 226. 

 Nutting, Hydroids of Woods Hole, igoi, p. 354. 



Trophosome. — Colony small, not over one-half inch in height; stem delicate, sometimes annulated 

 or wavy, irregularly branched; branches given off below the hydrophores, making almost a right angle 

 with the stem; hydrophores strongly flaring, usually reduplicated. 



Gonosome. — Gonangia oval or ovate, smooth, borne at the base of the branches or below the hydro- 

 phores. 



Distribution. — On sponge dredged by the Fish Hawk, on which were specimens of Aglaophenia 

 rigida. 



There was no gonosome; the figure is taken from Hincks. 



Family LAF(E1D^. 



Trophosome. — Hydrothecse tubular, margin entire, operculum absent, no diaphragm; hydranth, 

 with conical proboscis. 



Gonosome. — Gonangia forming a Coppinia mass. 



The genus Fikllum is the only genus of this family represented in this material. 



Genus FILELLUM. 



Trophosome. — Stem a slender stolon, parasitic on other hydroids; hydrothecae, partly adherent, 

 curved outward from the support at the point of separation. 

 Gonosome. — A Coppinia mass. 





 A 



Fig. i2. — Filettum cx- Tig. 33— Fitellum serpens {HslssM). A and B, hydrothecx; C, Coppinia 



pansum Levinsen. mass (alter Bonnevic). 



Filellum expansum Levinsen. 



FMlum expansutn Levinsen, Hydroider fra Gronlands Vcstkyst, 1893, p. 30. Fraser, West Coast Hydroids, 1911, p. jo. 



Trophosome. — Stolon creeping over other hydroids, Bryozoa, etc.; hydrotJieca minute, adherent 

 for about half of its length, to the siuface over which the stolon creeps, tlicn abruptly turned away. 

 The free portion is provided with three or more annulations, in the form of ridges, that may be either 

 transverse or oblique. The free portion is more slender than the adherent portion. The margin is 

 flaring. 



Gonosome . — Unknown . 



Distribution. — On sponge dredged by tlie Fish Hawk. 



