NO. 1933. BRYOZOA FROM EASTERN NORTH AMERICA— 08BURN. 281 



MYRIOZOUM COARCTATUM (Sars). 



Myriozbum subgracile Packard, 1867, p. 276 and elsewhere. — Whiteaves, 1869, 

 p. 2; 1874, p. 5; 1901, p. 99 (two species).— Rink, 1875, p. 444, both M. 

 coarctatum and M. subgracile. 



Leieschara coarctaum and L. subgracile Verrill, 18796, p. 30. 



Localities. — Outside of Hebron, Labrador, two colonies; Shoal 

 Tickle, Labrador, common. 



CELLEPORA CANALICULATA Busk. 



Localities. — I ourteen miles south of Cape Sable, few; Browns Bank 

 off Cape Sable, several colonies. 



This species encrusts the stems of other Bryozoa or of Hydroids, 

 forming pisiform or occasionally branched colonies with a diameter 

 usually less than one-fourth inch. Busk described the species from 

 the Challenger dredgings off Halifax, Nova Scotia. Hincks has 

 recorded it for the Gulf of St. Lawrence, and the writer has obtained 

 it off Cape Cod, Massachusetts. It seems to be common between 

 Cape Cod and Newfoundland, judging by the collections of the 

 United States Bureau of Fisheries, and there is no way of determining 

 how much it has been confused with other species by earlier writers. 



CELLEPORA CONTIGUA (Smitt). 

 Plate 34, fig. 1. 



Locality. — Fourteen miles south of Cape Sable, one colony on shell 

 of Pecten tenuicostata. 



The specimen is in a very advanced stage of calcification. As far 

 as can be judged from Smitt's description (1867, p. 31, figs. 198-201) 

 and his very small figures the determination of the species is correct. 

 Figure 1 shows a couple of zocecia near the edge of the colony. In 

 the fully calcified condition the outlines of the zooecia are completely 

 immersed in a continuous nodular crust. 



CELLEPORA SURCULARIS (Packard). 



Celleporaria surcularis Packard, 1863, p. 410, and 1867, p. 274. — Verrill, 1879ft, 



p. 30. 

 Celleporaria incrassata Whiteaves, 1874, p. 5.-^Rink, 1877, p. 444. 

 Porella surcularis Whiteaves, 1901, p. 104. 

 Cellepora incrassata of Authors, not of Lamarck. 



Localities. — Fourteen miles south of Cape Sable, two fine colonies; 

 off Cape Race, one fragment; off St. Lawrence Harbor, Placentia 

 Bay, one fragment; St. Pierre Bank, Newfoundland, one colony 

 attached to shell; outside of Hebron, Labrador, one colony; Shoal 

 Tickle, Labrador, several colonies; 20 miles northeast of Nain, 

 Labrador, one fragment. 



This is the Cellepora incrassata of authors, but the species described 

 under this name by Lamarck is known to have been from the Medi- 

 terranean and is not identical with the present one. Busk seems to 

 have had this species when he discussed and figured ' ' Cellepora cervi- 



