THE MOUNT DESERT REGION 351 



Vesiculariidae Hincks, 1880 

 BowERBANKiA Farre, 1837 



BowERBANKiA GRACILIS Leidy, 1855. PL 5, fig. 2. (Osbiirn, 

 1912, p. 253, synonymy and references ; 1912 a, p. 287, the 

 variety caudata Hincks, Cape Sable, Nova Scotia.) Frequent, 

 taken at seven shore stations and eighteen dredging stations, 

 in shallow water, growing over stems of various kinds. Most 

 specimens show the caudate process representing the var. 

 caudata of Hincks. The range of the species on the American 

 coast is from Curasao, in the Caribbean Sea, to Grreenland, 

 and Hincks described his B. caudata from England. Whit- 

 eaves and other writers have not listed it for eastern Canada 

 (except Osburn, see above), but as I have specimens from 

 Hudson Strait, it is probably distributed along the entire 

 coast. 



The zoarium is branching and stolonate, usually loosely 

 attached, but sometimes with free branches. The small 

 zooecia are attached irregularly to the stolon. They are elon- 

 gated, subcylindrical, usually somewhat squared at the distal 

 end and narrowed at the base. They are transparent enough 

 so that the rounded gizzard may be seen readily. 



Buskiidae Hincks, 1880 

 BusKiA Alder, 1856 



BusKiA ARMATA (Verrill), 1874. PI. 4, fig. 4. (Osburn, 1912, 

 p. 256 (Hippuraria), synonymy and references.) Rare, only 

 one small colonj^ noted, among specimens of Boiverhankia 

 gracilis, at dredging station 20, near the mouth of Salisbury 

 Cove on the north side of the island. The species has hitherto 

 been recorded only from southern New England, though I 

 have seen specimens from north of Cape Cod. The present 

 record is probably about its northern limit. Southward it 

 extends to the Carolina coast. 



The zoarium is stolonate and creeps over stems, with occa- 

 sional branches rising free. The small, long ovate zooecium 

 has a flattened area on one side which is less heavily chitinized. 



