152 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



group by Harmer (1926:409) and the comments of Silen (1941:92) 

 offer satisfactory evidence against such a wide separation of the evidently 

 related genera. 



Key TO Genera of Bicellariellidae 



1. Proximal end of zooecium narrow and tubular 2 



Proximal end not narrowly tubular 4 



2. Tubular base of zooecium expanded abruptly, zoarium sprawl- 



ing or repent and loosely attached Beania 



Tubular base expanding gradually, zoarium erect 3 



3. Zooecium constricted into three definite regions, the terminal 



one expanded Bicellariella 



Zooecium not differentiated into "segments." . . Corynoporella 



4. Zoarium multiserial, erect, recumbent or encrusting; base of 



zooecium transverse at point of origin 5 



Zoarium biserial to narrow multiserial, erect, base of zooecium 



forked or diagonal at point of origin 6 



5. Zoarium erect or recumbent, attached by radicles ; a thickened 



dorsal area on either side of the distal zooecial wall. Dendrobeania 

 Zoarium encrusting loosely, not attached by radicles ; no thick- 

 ened dorsal area; numerous proximal spines and paired 

 avicularia on the gymnocyst Sessibugula 



6. Zoarium with segmented stalk, the segments are modified zo- 



oecia (kenozooecia) ; base of zooecium at point of origin 



diagonal Caulibugula 



Zoarium erect and bushy, without segmented stalk ; base of zo- 

 oecium at point of origin strongly forked Bugula 



Genus BICELLARIELLA Levinsen, 1909 

 Bicellariella Levinsen, 1909:431, replacing Bicellaria Blainville, preoc- 

 cupied. 



Levinsen (1909:99), under Bicellaria Blainville, gives the following 

 diagnosis of the genus: "Each zooecium consists of three sections, sepa- 

 rated by constrictions, of which the middle one is elongated, cylindrical, 

 while the distal one is obliquely funnel-shaped ; the basal edge of the 

 distal wall unequally asymmetrically angular; the radical fibers issue 

 from the basal side of the zooecium." To this Harmer (1926:421) adds 

 that the turbinate zooecia are typically provided with numerous oral and 

 distal spines. Genotype, Sertularia cilata Linnaeus, 1758:815. 



From the above description of the genus it becomes evident that no 

 species of Bicellariella has been recorded from the Pacific coast. O'Dono- 

 ghue tentatively placed two species here, but neither of them shows the 

 zooecial constrictions and their ovicells are quite different from those of 

 Bicellariella. As no opportunity has been offered to study specimens, I 

 leave them here until more information is available. 



