NO. 1 OSBURN : EASTERN PACIFIC BRYOZOA CHEILOSTOMATA 83 



The ovicell is broad, not prominent, and the proximal edge of the 

 ectooecium forms a slightly arcuate ridge across the middle. In advanced 

 stages of calcification the ovicell tends to become immersed. 



Hincks recorded this species from Houston-Stewart Channel, British 

 Columbia. It is knovi^n from the northern coasts of Europe and ranges 

 down the east coast of North America from Greenland to Cape Cod, 

 Massachusetts. 



Punuk Island, Bering Sea, and Cleveland Passage, Frederick Sound, 

 Alaska. Also common at Point Barrow, Alaska, G. E. MacGinitie, col- 

 lector, Arctic Research Laboratory. 



Tegella aquilirostris (O'Donoghue), 1923 



Membranipora aquilirostris O'Donoghue, 1926:28. 

 Tegella aquilirostris J O'Donoghue, 1926:37. 



Zoarium encrusting on stones, shells or kelp. Zooecia of moderate 

 size, opesia large, oval, walls raised, smooth ; gymnocyst well developed ; 

 no erect spines, one to three pointed spines curving over the opesia. Ovi- 

 cell prominent, with a strong transverse frontal ridge. The basal avicu- 

 larium is large and when an ovicell is present the chamber becomes more 

 or less united with the ectooecium. (After O'Donoghue.) 



This species appears to be rather closely related to robertsonae but 

 the prominent ovicell and the absence of erect tubular spines seem suf- 

 ficient to differentiate it. Possibly it may vary into robertsonae. O'Dono- 

 ghue found it at several localities in British Columbia waters. It has not 

 been noted in the Hancock collection. 



Genus DORYPORELLA Norman, 1903 



This is a peculiar genus among the Alderinidae, as the reticulated 

 gymnocyst is so extensive that it often limits the opesium so much that 

 older authors placed the one species then known, spathulifera Smitt, under 

 genera of Ascophora. Pore chambers are present ; small frontal avicularia ; 

 four to six distal spines. Ovicell hyperstomial, not closed by the opercul- 

 um. Levinsen (1909:150) submerged this genus in Callopora but as the 

 genera in the Alderinidae are now understood Doryporella appears to 

 have a satisfactory basis. Genotype, Lepralia spathulifera Smitt, 1867:20. 



