NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 653 



Hancock Collections: numerous shore stations and shallow-water 

 dredgings about the off-shore islands of southern California; Station 

 225-34, Gorgona, Colombia, 2°58'55"N, the most southern record. Also 

 Albatross collections, 1911 cruise, at San Francisquito Bay and San 

 Esteban Bay, Lower California. 



TubuHpora pulchra MacGillivray, 1885 

 Plate 68, figs. 2, 3, and 4 



TubuHpora pulchra MacGillivray, 1885:95. 

 TubuHpora fimbria forma pulchra. Waters, 1887:258. 

 TubuHpora pulchra, Robertson, 1910:250. 

 TubuHpora pulchra, O'Donoghue, 1923:8; 1926:25. 



A beautiful small, white, delicate species which adheres loosely to the 

 substratum, usually a kelp, but frequently to shells. The zoaria are 

 small, usually only 2 or 3 mm in extent, more or less fan-shaped or ovate, 

 sometimes with lobes of the same size and form. A peculiarity of the 

 dorsal surface is the presence of numerous short attachment processes 

 which support the zoarium "on tiptoe," as Miss Robertson suggests; on 

 the marginal zoids these are larger and project laterally to give the 

 border a serrated appearance, especially near the ancestrula. The tubules 

 are small, elongate and very slender ; the peristomes are long and slender 

 (0.08 to 0.09 mm in diameter), not connate and not seriated. 



The ovicell or gonozoid is simple and little expanded, its form fre- 

 quently resembling that of a Crista but more embedded; at its fullest 

 development there are 2 or 3 short lobes extending laterally between 

 the peristomes. The ooeciostome is erect and moderately high ; at the base 

 it is about as wide as a peristome and at the tip it flares out into a com- 

 pressed trumpet shape about twice the width of the base; it is never 

 connate with another tubule. 



MacGillivray described the species from Australia, Robertson re- 

 corded it from the southern California coast, and O'Donoghue found 

 it at a number of localities in British Columbia. 



Hancock Stations: numerous stations along the coast of California 

 and among the Channel Islands; Station 72, Guadalupe Island, and 

 136-34, Clarion Island, west of Mexico; 468-35, Port Parker, Costa 

 Rica; 462, James Island, Galapagos. Shore to a depth of 35 fms. 



TubuHpora flexuosa (Pourtales), 1867 

 Plate 71, fig. 11 



Idmonea flexuosa Pourtales, 1867:111. 

 Idmonea atlantica var. flexuosa, Smitt, 1872:6. 

 lldmonea atlantica var. tenuis Busk, 1875:11. 



