NO. 2 OSBURN : EASTERN PACIFIC BRYOZOA — CHEILOSTOMATA 449 



labellum and narrow lateral flanges which extend beyond the tip of the 

 labellum. As calcification proceeds the ovicell becomes deeply immersed. 



It seems quite possible that P. pacifica may be found to intergrade 

 with the Pleistocene P. labiata. Canu and Bassler, who record both of 

 them from the same localities, Pleistocene of San Pedro and Santa 

 Monica, indicate the differences only as the larger size of the peristomice 

 of pacifica and the absence of a labellum in labiata. Our Pleistocene 

 specimens from Santa Barbara (the type locality of labiata) occasionally 

 show a definite trace of a labellum, while others have it well developed. 

 Perhaps pacifica should have been recorded merely as a variety of the 

 Pleistocene labiata. 



Recorded by Robertson from Puget Sound to the coast of California, 

 and by O'Donoghue from a number of British Columbia localities. 



In the Hancock dredgings it occurred at 78 stations, ranging from 

 the coast of Oregon to Peru (Independencia Bay) and the Galapagos 

 Islands (Wenman, Albemarle and James) : also in the Gulf of Cali- 

 fornia from Agua Verde Bay, near the mouth, north to Angel de la 

 Guardia Island. It appears to be most abundant on the coast of the 

 United States from Oregon to southern California. The bathymetric 

 range is from shallow water to more than 100 fms, and it is frequently 

 found washed up on shore. 



Phidolopora pacifica van catalinensis (Robertson), 1908 



Retepora pacifica catalinensis Robertson, 1908 :31 1. 



This variety from Catalina Island, southern California, according 

 to Miss Robertson's description, appears to differ from pacifica only in 

 "the greater height of the peristome and in the loop formed by the 

 peristome in front." This loop closes off the proximal part of the secondary 

 sinus (spiramen) to form a pore. In ordinary specimens of pacifica 

 this occasionally happens. In our material I have found no colonies 

 worthy of a varietal name. 



Genus SGHIZORETEPORA Gregory, 1893 



Schizellozoon Canu and Bassler, 1917. 

 Schizoretepora Harmer 1933 :619. 



Gregory's description is so brief as to be practically useless, but he 

 indicated Retepora tessellata Hincks, 1878, as the type which as Harmer 

 indicates (1933:619) "makes it necessary to admit the genus as valid." 



Canu and Bassler (1917:55) described Schizellozoon with Retepora 



