358 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Gonosome . — Gonangia borne at origin of xiedicels, very large, oblong-ovate in outline. 
Distribution . — I find this species mentioned in my notes as occurring at Woods Hole, but the 
specimen seems to have been lost. The figure is from an English specimen. 
Halecium beani (Johnston). Fig. 53. 
( Thoa beani Johnston, British Zoophytes, p. 120.) 
Trophosome. — Colon}' 2 to 5 inches high, branching in a dendritic manner, more delicate than II. 
halecinum; stem fascicled, the branches slender, the internodes divided by slightly oblique nodes. 
Hydrophores much as in 11. halecinum. 
Gonosome . — Female gonangia mitten-shaped, with the aperture lateral, representing the cut-off 
thumb of the mitten. Male gonangia oblong-ovate. 
Distribution . — Found growing on bivalve shells at Woods Hole. 
Halecium gracile Yerrill. Fig. 54. 
(Invertebrated Animals of Vineyard Sound, p. 729.) 
Trophosome . — Colony profusely branched; stem fascicled; branches ascending, slender, pinnately 
arranged, with slender internodes separated by oblique nodes. Hydrophores much as in II. halecinum. 
Gonosome . — Female gonangia much as in II. halecinum, hut with the end emarginate. Male 
gonangia oblong-ovate. 
Distribution. — Buzzard’s Bay; Vineyard Sound; near New Haven, on floating timber (Verrill). 
Professor* Verr ill has kindly sent me a type specimen from which the figures were drawn. 
Although hard to differentiate succinctly from II. halecinum, it has a very distinct facies and mode of 
growth. 
