HYDROIDS FROM NOVA SCOTIA 175 



Sertularella polyzonias (Linnaeus). 



Sertularella polyzonias Nutting, Amer. Hydroids, Part II, 

 1904, p. 90. 



Sertularia polyzonias Linnaeus, Sy sterna Naturae, 1758, p. 813. 

 Sertularella polyzonias Nutting, Hydroids of Woods Hole, 

 1901, p. 362. 



Sertularella polyzonias Whiteaves, Marine Invert. Eastern 

 Can., 1901, p. 25. 



Dredged in rocky bottom in 10-20 fathoms, Chedabucto bay, 

 Canso. 



Sertularella tricuspidata (Alder). 



Sertularia tricuspidata Alder, Ann. and Mag. Nat. Hist., 2nd 

 ser. XVIII, 1856, p. 356. 



Sertularella tricuspidata Nutting, Hydroids of Woods Hole, 

 1901, p. 362. 



Sertularella tricuspidata Whiteaves, Marine Invert. Eastern 

 Can., 1901, p. 26. 



Sertularella tricuspidata Nutting, Amer. Hydroids, Part II, 

 1904, p. 71. 



Common on rocks and ascidian stems in 50 fathoms, Canso 

 Banks. 



Genus Sertularia. 



Sertularia pumila Linnaeus. 



Sertularia pumila Linnaeus, Systema Naturae, 1758, p. 807. 

 Sertularia pumila Nutting, Hydroids of Woods Hole, 1901, 

 p. 359. 



Sertularia pumila Whiteaves, Marine Invert. Eastern Canada, 

 1901, p. 25. 



Sertularia pumila Nutting, Amer. Hydroids, Part II, 1904, 

 p. 51. 



Very abundant everywhere, on piles, stones, seaweeds, etc., 

 near the surface of the water, Canso. 



