334 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Eudendrium capillare Alder. 
(Catalogue of the Zoophytes of Northumberland and Durham, p. 105.) 
Trophosome . — Colony attaining a height of about one-half inch, sparsely branching, the branches 
and pedicels being sparingly annulated. Hydranth body vasiform. 
Gonosome . — Male gonophores 2 or 3 chambered, borne on aborted hydranths springing either from 
the branches or hydrorhiza. Female gonophores also borne on aborted hydranths. 
Color . — Hydranths pale greenish. Male gonophores orange. 
Distribution . — Newport, R. I., in shallow water. (C. C. N. ) 
11. Evdcndrium album Nutting. A. Hydranth with male gonophores. 
Eudendrium album Nutting. Fig. 11. 
(Annals and Magazine of Natural History, May, 1898, p. 362.) 
Trophosome . — Colony minute, attaining a height of about one-third inch, branching in a strag- 
gling manner, the ultimate branches or pedicels being exceedingly long and slender, pellucid, and not 
decidedly or regularly annulated. Hydranths with vasiform bodies. 
Gonosome . — Male gonophores 2 or 3 chambered, borne on hydranths that are generally not 
aborted, but may be considerably reduced in size. Female gonophores apparently not so numerous as 
in allied species, borne on partially aborted hydranths. 
Color . — General color white, hydranths almost entirely so. Male gonophores pale orange yellow. 
Distribution . — Found on floating seaweed secured in taking the tow at Woods Hole; also on U. S. 
Fish Commission wharf. 
HYDRACTINID.E. 
Trophosome . — Colony formed of “persons” of three sorts springing from an incrusting layer 
beset with jagged spines. Perisare not evident. Hydranths with a single whorl of filiform tentacles 
and a conical proboscis. “Spiral zooids” or defensive persons slender, cylindrical, spirally coiled, 
with large nematocyst batteries near their distal ends. 
Gonosome . — Gonophores fixed sporosacs borne on blastostvles, forming a third or sexual person of 
the colony. 
HYDRACTINIA. 
Characters of the family as given above. 
