222 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Halecium densum Calkins 



Halecium densum Calkins, Hyd. Puget Sound, 1899, p. 343. 

 Fraser, Hyd. Pacific Coast, 1937, p. 103. 



Distribution. — Off Dutch Harbor, San Nicolas Island, 4-9 fathoms; 

 off San Nicolas Island, 28-31 fathoms. 



Halecium exiguum, new species 

 Plate 25, Fig. 9 



Trophosome. — Colony, 15 mm, simple, slender, lax; stem sometimes 

 erect with few irregularly placed branches, sometimes definitely flexed. 

 Usually there is a distinct bend near each internode and the pedicel or 

 branch is given off in such a way that it looks like dichotomy, but the stem 

 has a node just above the forking. There may be an annulation about half 

 way between the nodes. When a branch appears, it takes the place of a 

 hydrophore; it resembles the main stem. The hydrophore is provided with 

 a distinct pedicel ; it is strongly flaring. Commonly a second hydrophore 

 grows out of the first one and is similar to it ; in some cases, the duplica- 

 tion may proceed even farther. 



Gonosome. — Not observed. 



Distribution. — Station 311-35, off Bindloe Island, Galapagos, 20 

 fathoms ; off Lobos de Afuera Islands, Peru, 25-30 fathoms. 



Remarks. — The species is not much like any of the other species in 

 the Eastern Pacific. In the mode of growth it resembles Ophiodissa alter- 

 nata Fraser, more than it does any species of Halecium. 



Halecium fasciculatum Fraser 

 Halecium fasciculatum Fraser, Hancock Hyd., 1, 1938, p. 42. 



Distribution. — South of San Esteban Island, Gulf of California, 35 

 fathoms. 



Halecium flexile Allman 

 Halecium flexile Allman, Challenger Hyd., 2, 23, 1888, p. 11. 

 Eraser, Hyd. Pacific Coast, 1937, p. 104. 

 Distribution. — 35 miles north of Depoe Bay, Ore., from a water- 

 logged stump; 13^ miles south of Crook Point, San Miguel Island, 41-43 

 fathoms; 1^ miles east of Cardwell Point, 20-21 fathoms; 2% miles east 

 of South Point, Santa Rosa Island ; 23-28 fathoms ; 1 ^ miles west of 

 Catalina Head, Santa Catalina Island, 50-51 fathoms; Dewey Channel, 

 opposite San Eugenio Point, Lower Calif., 21-24 fathoms; Boca de la 

 Trinidad, Gulf of California, 53, 150 fathoms. 



