HYDROIDS FROM NOVA SCOTIA 
175 
Sertularella polys oni as (Linnaeus). 
Sertularella polyzonias Nutting, Amor. Hydroids, Part II, 
1904, p. 90. 
Sertularia polyzonias Linnaeus, Systema Naturae, 1758, p. 813. 
Sertularella polyzonias Nutting, Hydroids of Woods Hole, 
1901, p. 362. 
Sertularella polyzonias Wbiteaves, Marine Invert. Eastern 
Can., 1901, p. 25. 
Dredged in rocky bottom in 10-20 fathoms, Chedabucto bay, 
Canso. 
Seetularella 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. 
