NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 637 



This species is evidently congeneric with patina and sarniensis, judging 

 by the nature of the tubules and especially by the characters of the 

 ovicell. 



Described from the Galapagos Islands, Albatross Station D. 2813. 



Hancock Stations 143-34, oflF Wenman Island, Galapagos, 1°23'10"N, 

 91°48'45"W, at 100 to 150 fms, several colonies on shells. 



Plagioecia anacapensis new^ species 

 Plate 66, figs. 9 and 10 



? Dtastopora catillus J. Y. Johnson, 1897:61. 



The zoarium is round and flat but the margin is more or less turned 

 up to produce small saucer-shaped colonies, which are attached by a 

 comparatively small peduncle. The basal lamina is of moderate width. 

 The zooecia about the center, with short peristomes, are arranged quin- 

 cuncially, but beyond this area they form uniserial radiating rows which 

 extend to the margin, similar to the fossil Unitubigera of d'Orbigny, 

 1853. Additional shorter series are interpolated toward the margin. The 

 tubules are embedded, convex on the frontal surface, the walls perforated 

 and later often transversely ribbed. The peristomes are semierect and 

 beyond the central area become longer (0.25 mm or more). The central 

 peristomes are always free and isolated, those in the radiating series 

 sometimes connate at the base but the tips always free; diameter at the 

 tip 0.13 mm, the aperture round and 0.10 mm in diameter. 



The ovicell is inflated, its outlines distinct, transversely elongate 

 (usually more than twice as wide as long), surrounding one or more 

 peristomes. The ooeciostome is terminal at the middle of the distal 

 border, short, erect, its rim flared like the bell of a cornet, the ooeciopore 

 round and 0.08 mm in diameter, the rim circular and about 0.13 mm 

 across. 



When this material was first examined I placed it at once under 

 Unitubigem d'Orbigny, 1853, but the large non-seriated central area 

 is different and the nature of the ovicells (unknown in Unitubigera) is 

 distinctly like that of Plagioecia patina. 



There is a possibility that this species may be the Diastopora catillus 

 of J. Y. Johnson (1897:61) from Madeira; his description is fairly 

 similar, but he did not give a figure and did not mention the ovicell. 



Type, AHFno. 113. 



Type locality, Hancock Station 874-38, off Anacapa Island, southern 

 California, 34°0r30''N, 119°21'W, at 45 fms, one colony on a shell. 

 Also two colonies recovered from a sunken buoy off Rocky Point, south- 



