240 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Stem and in the branches. As the hydrothecae are shaped much like those in 

 S. cylindrica (Clark), or perhaps even more like those of S. pinnata Mer- 

 eschkowsky, a portion of the branch looks like the proximal portion of the 

 branch of S. cylindrica or any part of the branch in S. pinnata. On the 

 stem, of course, the arrangement is entirely different since in those two 

 species, there are but two series of hydrothecae. The hydrothecae are 

 almost completely immersed ; the entire margin is almost vertical. The 

 operculum consists of a single abcauline flap. 



Gonosome. — Not observed. 



Distribution. — Station 1283-41, 2^ miles east of South Point, Santa 

 Rosa Island, 23-28 fathoms; north of Santa Barbara Island, 100 fathoms. 



Selaginopsis mirabilis (Verrill) 

 Diphasia mirabilis Verrill, Amer. Jour. Sc, (3), 5, 1872, p. 9. 

 Selaginopsis mirabilis Fraser, Hyd. Pacific Coast, 1937, p. 145. 

 Distribution. — Puget Sound. 



Selaginopsis trilateralis Fraser 

 Selaginopsis trilateralis Fraser, Queen Charlotte Hyd., 1936, p. 504. 



Fraser, Hyd. Pacific Coast, 1937, p. 148. 

 Distribution. — NE of Anacapa Island, 50 fathoms; IJ^ miles north 

 of Cedros Island, 55-60 fathoms. 



Selaginopsis triserialis Mereschkowsky 

 Selaginopsis triserialis Mereschkowsky, Ann. and Mag. Nat. Hist., 



(5), II, 1878, p. 435. 

 Fraser, Hyd. Pacific Coast, 1937, p. 148. 

 Distribution. — 3 miles south of Fraser Point, Santa Cruz Island, 20- 

 24 fathoms; Prisoners Harbor, 35-45 fathoms; ^ mile east of Cat Rock, 

 Anacapa Island, 23-25 fathoms; NE of Anacapa Island, 50 fathoms; 

 153^ miles WNW of Santa Barbara Island, 70 fathoms; off San Nicolas 

 Island, 28-31 fathoms; 1^ miles north of Cedros Island, 55-60 fathoms. 



Genus SERTULARELLA 

 Sertularella amphorifera Allman 

 Sertularella amphorif era Allm AN, Gulf Stream Hyd., 1877, p. 22. 



Eraser, Atlantic Hyd., 1944, p. 256. 

 Distribution. — 9 miles off San Diego, 78-81 fathoms; 8 miles west of 

 Cedros Island, 64-65 fathoms. 



