Polyzoa of Queen Charlotte Islands. 5 



very striking kind, of that instability of tlie avicularian struc- 

 ture, upon which I liave often insisted. 



Apart from its avicularium, S. varians presents no very 

 striking features ; and, of course, the variability in this organ 

 would not in itself constitute a specific distinction. In other 

 respects, however, it is, I believe, sufficiently distinct from the 

 various described forms. 



Scrvpocellaria brevisetis, n. sp. -^ 



Zocecia biserial, alternate, elongate, tapering downward, 

 surface smooth and glossy ; area oval, about half the length of 

 the cell or less, set somewhat obliquely, surrounded by a rather 

 broad smooth border ; three spines on the outer side above, 

 and one or two on the inner ; operculum small, placed about 

 the middle of the inner side, when mature entire or with a 

 slightly irregular margin, narrow towards the base, expanding 

 above it, surface smooth. Lateral avicularium sometimes 

 gigantic and much swollen below, sometimes very small, with 

 a triangular mandible somewhat bent at the apex ; the beak 

 strongly hooked. Fiiracw/arce// placed just above the lateral 

 avicularium, rounded and somewhat contracted below, ex- 

 panding very slightly upward, truncate above, a constriction 

 about the middle, immediately below which is the orifice from 

 which the radical fibre springs, the terminal groove straight 

 or slightly oblique, stretching across the back of the cell ; 

 seta very short, about twice the length of the groove. 

 Ooecium {?). Zoarium of a stout habit; internodes mode- 

 rately long (7-10 cells). 



Log. Houston Stewart Channel. 



This species bears some resemblance to 8. scrupea, but is 

 at once distinguishable from it by the differences in the vi- 

 braculum. 



Cabeeea, Lamouroux. 



Caberea Ellisn^ Fleming. 



Off Cumshewa Harbour. [Vancouver Island {Dawson) ; 

 Labrador and Maine, Greenland, Iceland, Scandinavia and 

 Finmark, Britain (North), Brittany.] 



Family Bicellariidae. 



BuGULA, Oken. 



Bugula avicularia^ Linneeus. 



Houston Stewart Channel, 8-20 fms. ; Virago Sound, 

 8-15 fms. [Spitzbergen, Britain, Adriatic, Australia.] 



