256 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Aglaophenia fluxa, new species 

 Plate 31, Fig. 26 



Trophosome. — Colony consists of a long, slender, lax stem, 20 cm, 

 and 1 or more branches, that may be almost as long as the main stem; 

 from the main stem and the primary branches, scattered, short branches 

 are given off; all of them are divided into regular, short internodes by 

 well marked nodes; each internode of the stem or branch gives off a 

 hydrocladium, the hydrocladia alternately arranged and fronto-laterally 

 placed. The hydrocladia are relatively short, often not more than 2 mm 

 in length, but sometimes as long as 5 mm, divided into regular, short 

 internodes by slightly oblique nodes. The septa are scarcely developed, 

 only one, opposite the hydrothecal septum, showing. The hydrotheca is 

 short and stout, with only 1 short, intrathecal septum. There are 1 1 mar- 

 ginal teeth ; the median tooth is sharp, strongly retrorse ; the first lateral 

 tooth is larger and projects forward ; the second is usually smaller, some- 

 what sharp rather than rounded; the third is larger and more rounded; 

 the fourth is nearly the same shape and size as the third ; the fifth is slen- 

 der and is definitely pointed, often to be seen only with difficulty, as it is 

 so near the rear median line. The supracalycine nematophore is of medium 

 size, scarcely reaching the margin of the hydrotheca; the mesial nemato- 

 phore is about two-thirds of the length of the face of the hydrotheca, with 

 but a small portion, less than one-fourth, free. The three cauline nemato- 

 phores are of the usual type. 



Gonosome. — The corbula is 3 mm in length, and 1.25 mm in greatest 

 depth ; it is slightly greater in the proximal portion than in the distal ; 

 there are 10. pairs of leaves; there are no perforations and the basal 

 nematophore does not form a spur. There are 2 hydrothecae between the 

 corbula and the stem. 



Distribution. — Station 1241-41, 7^ miles south of Point Loma, 

 Calif., 30-33 fathoms; off Redondo Beach; 2 miles off Belmont Pier, 

 7-10 fathoms; 3 miles off Seal Beach, 11 fathoms; off Huntington Beach, 

 4-20 fathoms; 6 miles SE of San Pedro breakwater, 20-21 fathoms; off 

 San Nicolas Island, 28-31 fathoms. All in southern California waters. 



Aglaophenia inconspicua Torrey 

 A glaophenia inconspicua Torrey, Hyd. Pacific Coast, 1902, p. 72. 



Fraser, Hyd. Pacific Coast, 1937, p. 176. 

 Fraser, Hancock Hyd., 1, 1938, p. 56. 

 Distribution. — 3 miles SE of Cat Rock, Anacapa Island, 23-25 fath- 



