NO. 1 OSBURN: eastern pacific BRYOZOA CHEILOSTOMATA 153 



? Bicellariella brevispina (O'Donoghue), 1923 



Bicellaria brevispina O'Donoghue, 1923 :19. 

 Bicellariella brevispina, O'Donoghue, 1926:43. 



The zooecia are very slender and elongate, with the opesia extending 

 about half the frontal length and the form is not at all turbinate in the 

 bicellarian sense; there are no constrictions of the zooecial body; avic- 

 ularia are wanting; the spines are not bicellarian, and the ooecium which 

 is deeply embedded in the base of the succeeding zooecium is totally dif- 

 ferent. The sterile zooecia have considerable resemblance to those of cer- 

 tain species of Brettia but that genus is not known to have ovicells. 



Gabriola Island, Union Bay and Bull Passage, British Columbia 

 (O'Donoghue). 



? Bicellariella stolonifera O'Donoghue, 1926 



O'Donoghue 1926:43. 



The zoarium consists of a creeping stolon from which arise the zooeci- 

 al branches with a small number of zooecia. The form of the zooecium 

 is somewhat turbinate, but the opesia occupies most of the length and 

 there is no evidence presented of the constriction into three regions which 

 is characteristic of Bicellariella. The distal spines are arranged in outer 

 and inner groups like those of Bugula, but one or two proximal spines 

 may also be present. The avicularia are lateral, half way up the side of 

 the opesia. The ooecium is terminal instead of on the inner corner and 

 "does not appear to be a pedunculate structure." 



Cape Lazo to the San Juan Islands, British Columbia (O'Donog- 

 hue ) . Apparently this is not a Bicellariella. 



Genus BUGULA Oken, 1815 



Genotype, Sertularia neritina Linnaeus, 1758. 



As at present understood, this genus includes a rather large series of 

 species which are for the most part biserial, but with occasional uniserial 

 or multiserial zoaria. The zoarium is unilaminar, with the zooecia all 

 facing in the same direction. At the point of origin on the dorsal side, 

 the zooecia are usually prominently forked, and the distal end of each 

 zooecium extends above the base of the succeeding one. The opesia oc- 

 cupies nearly all of the frontal surface, and the side walls are somewhat 

 reduced with mere angulation of the distal corners. The stalked avicularia 

 are of the "birds-head" type and are often of diagnostic value. Ooecia 

 are typically globular and attached by a short stalk at the distal end in 



