348 BIOLOGICAL SURVEY OF 



The zoarium encrusts small stems, usually forming rounded 

 colonies, though I have seen roughly branched ones. The 

 young zooecia are somewhat ovate, punctured about the base, 

 and smooth; in older colonies the zooecia become erect, or 

 nearly so, and very irregularly disposed. The orifice is 

 rounded, with a rather broad sinus. Above the aperture rises 

 a very tall, stout, somewhat curved rostrum, grooved on its 

 anterior surface, and bearing at its tip a small round avicu- 

 larium. From the sides of the thin peristome a broad flange 

 connects with the sides of the rostrum. The ooecium is large, 

 broader than high, flattened on its proximal surface, and ir- 

 regularly punctured. 



Order CTENOSTOMATA Busk, 1852 



Flustrellidae Hincks, 1880 

 Flustrella Gray, 1848 



FlustfvElla hispida (Fabricius), 1780. PL 5, fig. 8. (Os- 

 burn, 1912, p. 250, synonymy and references ; Whiteaves, 1901, 

 p. 114, Nova Scotia; Cornish, 1907, p. 79, common at Canso, 

 Nova Scotia.) Extremely abundant on rock weed at shore 

 stations 26 and 42, and found also at stations 13 and 20. 

 Dredged at only one station, 30, in about 60 feet. The species 

 is a typical shorewise form, usually found in only a few feet 

 of water, and frequently between tide marks. Its distribution 

 is Arctic and North Atlantic, Greenland and south to southern 

 New England, the Murman coast and northern Norway and 

 south to France. 



The rather firm brownish gelatinous zoarium is entirely 

 encrusting, usually on the stems of Funis and AscophyUum. 

 The zooecia are large, but their structure is not easily ob- 

 served, except in younger zooecia, as the entire surface of 

 the colony bristles with the large chitinous spines, which are 

 arranged around the margin and the orifice. The aperture is 

 bilabiate and slightly raised. The presence of the spines and 

 the absence of calcification are sufficient to distingiiish the 

 species on the Atlantic coast. 



