NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 657 



The ovicells, three of which are complete, vary In size, with lobes 

 extending between the fascicles, their surface rather flat and very thickly 

 punctate. The ooeciostome is a large erect tube, about as wide as a 

 peristome at the base, connate, tall, punctate to its tip, somewhat com- 

 pressed and broader at the tip, its aperture about 0.30 mm wide by 0.18 

 mm long, and the edges of the long sides slightly inflexed ; arising proxi- 

 mal to the base of a peristome; in one case the ooeciostome curves 

 around the side of the adjacent peristome to open on its distal side. 



The nearly free central area, the great length of the large tubules 

 and the semi-erect clustered connate peristomes give this species an 

 unusual appearance. The ooeciostome with its broad base resembles 

 somewhat that of T. phalangea, but it is much larger and is not hooded 

 as in that species. 



Type, AHFno. 114. 



Type locality. Corona del Mar, southern California, 33°36'N, one 

 colony on the broad hold-fast of a kelp, washed up on the beach, R. C. 

 Osburn collector. 



Tubulipora flabellaris (Fabricius), 1780 

 Plate 68, fig. 8 



Tubipora flabellaris Fabricius, 1780:430. 

 Tubulipora flabellaris, Harmer, 1899:99 (synonymy). 

 Tubulipora flabellaris, Robertson, 1910:247. 

 Tubulipora flabellaris, O'Donoghue, 1923:8; 1926:24. 



The zoarium ranges in form from flabellate in younger colonies to 

 round in older ones, completely adnate and attached to shells, stems, 

 worm tubes, algae, etc., on flat surfaces usually very symmetrical and 

 reaching as much as 8 mm in diameter. The central part of the colony 

 is rather small, the first few peristomes free and often sinuate; beyond 

 this area the peristomes are arranged in hnear series (occasionally in 

 small groups) of 2 or 3 or longer, irregularly radiating. The peristomes 

 are high, slender, the apertures about 0.12 mm, connate for most of 

 their length but the tips usually free. 



The ovicell is more or less lobate, usually spreading between 3 or 4 

 fascicles, its surface rather coarsely punctate, and there is rarely any 

 evidence of striation; the ooeciostome is a tall slender tube at the side 

 of and partially connate with a peristome, much compressed toward the 

 top and the aperture slit-like, measuring about 0.13 mm long by 0.04 

 or 0.05 mm wide. 



