l8o NUTTING 



Halecium halecmiwi Verrill, Preliminary Catalogue Marine Invertebrates 

 Atlantic Coast, p. 17, 1879. — Marktanner-Turneretscher, Hydroiden 

 von Ost-Spitzbergen, p. 428, 1895. — Nutting, Hydroida from Alaska 

 and Puget Sound, Proc. U. S. Nat. Mus., Vol. xxi, p. 741, 1899. 



Distribution. — Kadiak, Alaska (Harriman Exped.) ; British Coast 

 (Hincks) ; Greenland (Marktanner-Turneretscher) ; New England 

 Coast (Verrill) ; Puget Sound (Nutting). 



HALECIUM MURICATUM (Ellis and Solander). 



Sertularia muricaia Ellis and Solander, Nat. Hist. Zoophytes, p. 59, 1786. 



Haleciiwi muricatutn Verrill, Preliminary Check-list Marine Invertebrates 

 Atlantic Coast, etc., p. 17, 1879. — Levinsen, Meduser, Ctenophorer og 

 Hydroider fra Gronlands Vestkyst, p. 61, 1893. — Clark, Proc. Acad. 

 Nat. Sci., Philadelphia, p. 217, 1876. 



Distribution. — Orca, Alaska (Harriman Expd.) ; British Coasts 

 (Ellis and Solander) ; Greenland (Levinsen) ; New England Coast 

 (Verrill). 



HALECIUM SCUTUM Clark. 



Halecium scutum Clark, Proc. Acad. Nat. Sci., Philadelphia, p. 218, 1876. 

 — Bonnevie, Norwegian N. Atlan. Exped., p. 57, 1899. 



Distributio7i. — Berg Inlet and Yakutat, Alaska (Harriman Exped.) ; 

 Unalaska (beach) and Shumagin Islands, Alaska (Clark) ; North 

 Cape, Norway (Bonnevie). 



HALECIUM REVERSUM sp. nov. 

 (Plate XXIII, figs. I, 2.) 



Trophosome. — Colony attaining a height of about one inch. Main 

 stem fascicled, branches simple and alternate, making a flabellate 

 colony. Nonfascicled part of the stem and branches divided into inter- 

 nodes, each of which bears one or two pedicels springing from its 

 proxit7ial portion. Pedicels long, of even diameter throughout, often 

 rugose on proximal portion. Hydrophores with large everted margins 

 and a distinct row of dots. Reduplication of margins distant, when 

 present. Hydranth small for this genus, with about twenty tentacles. 



Gonosome. — Not present in type specimen. 



Distribution. — Juneau, Alaska (Harriman Exped.). 



This species possesses the very exceptional, if not unique, character 

 of having the pedicels spring from the proximal part of the internode 

 instead of the distal portion, as in all other species of Halecium with 

 which I am acquainted. This character appears to be constant. The 

 specimen was dredged from a depth of twenty fathoms. 



