672 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



spaced and on a rough background may be quite irregular in distribution, 

 anywhere from 0.20 mm to more than 1.00 mm apart. Apparently the 

 genus is widely distributed over the central area of the Pacific. 



Filifascigera clarionensis new species 

 Plate 69, figs. 8, 9, and 10 



The zoarium is encrusting, tortuous, the branches narrow, averaging 

 about 0.60 mm in width between the fascicles. The basal portions of 

 the zooecial tubules are completely embedded with no separating grooves, 

 the distance between the fascicles varying greatly, from 0.26 to 1.10 

 mm and averaging about 0.60 mm. The fascicles, or bundles of tubules, 

 are nearly erect to a height of 0.40 to 0.50 mm, round or elliptical in 

 cross-section, and consist of 2 to 8 tubules (6 is a characteristic number). 

 The outlines of the tubules are evident only on the upper part of the 

 fascicles. At the top of the fascicles the tubules end in free peristomes 

 which are cylindrical, uniform in diameter or slightly flaring at the tips, 

 and curved outward from the center, the longest being as much as 0.40 

 mm. The apertures are circular, about 0.11 mm in diameter, and the 

 peristomes 0.14 mm in diameter. 



The ovicell is a rather conspicuous non-lobate swelling between the 

 fascicles and extending from one fascicle to the next, the peristomial 

 tubes rising above its level ; it measures about 0.55 by 0.80 mm. The 

 ooeciostome is somewhat off-center, a short tube which flares outward at 

 the edges, with a short-elliptical aperture; it is completely dissociated 

 from any of the zooecial tubules. 



The description is taken from two colonies from Clarion Island, one 

 on a worm tube, the other on a coralline. Another colony from Santa 

 Barbara Island, southern California, without an ovicell, appears to be 

 the same, as the measurements agree, and it also encrusts a worm tube. 



Type, AHF no. 125. 



Type locality, Hancock Station 137-34, Clarion Island, 18°19'05"N, 

 114°44'25''W, at 25 fms. Also at 1067, Santa Barbara Island, southern 

 California, 33°22'30''N, 119°03'45"W, at 55 fms; another at 1624-48, 

 Santa Catalina Island, 36 fms, on a shell, and still another at 1914-49, 

 San Cristobal Bay, Lower California, 27°24'48''N, 114°34'40''W, at 

 40 fms. 



Filifascigera fasciculata (Hincks), 1880 



Stomatopora fasciculata Hincks, 1880:441. 

 Proboscina fasciculata, O'Donoghue, 1926:17. 



