356 



HYDROIDiE. 



Part IV. 



Sertularia Lin? (restricted). 



S. cupressina Lin., Lmk., Johnd., VanBcn. — Europe (Ellis).'-^ 

 S. argeiitea Ellis and Sol, belongs also to this genus, and, probably, 

 also S. abietina Lin., S. filicula Ellis and ySol, and Plumularia 

 falcata Lmlc. 

 Amphitrocha Atj. — Sertularia Lmh. (p. p.). 



A. rugosa Ag. — Sertularia rugosa Lin. — Europe (Ellis). 

 A. picta Ag. — Sertularia picta 3Ie>jcn. — Terra del Fuego (Meyen). 

 A. cincta Ag. — Massachusetts Bay (Agassiz). 

 Cotulina Ag? — Sertularia Lin. (p.p.). 



C. polyzonias Ag. — Sertularia polyzonias Liu. — Europe (Ellis). — 

 Also S. Ellisii Milne-EJw. 

 Line ol aria Ifincks.'^ 



L. spinulosa Ilinch, An. and Mag. Nat. Hist., 1861, Vol. VII. PI. 13. 

 — Australia (Hincks). 



^ Sertularia Lin., Lamx. 

 Sertularia, Linne, Systema Natura;, 1707, p. 1:500. 

 " Linne, Fauna Suecica, 1701, p. .540. 



« Fabricius, Fauna Greenland., 1780, 



p. 442. 

 « Ellis and Solander, Zoiiph., 1780, 



p. 32. 

 « Gmelin, Linn. Systema Nat., 1788, 



p. .3844. 

 « Turton, British Fauna, 1807, p. 212. 



« Lamouroux, Bull. Soc. Phil., Paris, 



1812, p. 184. 

 " Lamouroux, Hist. Polyp. Flox., 1810, 



p. 182. 

 " Lamouroux, Expos. Mt^thodique, 1821, 



p. 12. 

 » Schweigger, Handbuch der Naturg., 



1820, p. 420. 

 « Goldfuss, Haudbuch der Zool., 1820, 



p. 88. 

 « Fleming, Brit. Animals, 1828, p. 542. 



« Blainville, Diet. Sc. Nat., 1830, LX. 



p. 444. 

 « Blainville, Manuel d'Actinologie, 1 834- 



1830, p. 480. 

 " Bosc, Hist, des Vers, 1830, p. 94. 



Sertularia, Johnston, Brit. Zoiiph., 1838, p. 121. 

 " Johnston, Brit. Zooph., 1847, 2d ed., 



p. 01. 

 " Alder, Catal. Zoiiph., Northumb., &e., 



1857, p. 21. 

 " Hincks, An. Mag. Nat. Hist., 1801, 



Vin. p. 252. 

 ^ As here limited, the genus Sertularia embraces 

 those species the sterile hydras of which alternate 

 on opposite sides of the stem, with a tendency to 

 a combination in pairs ; fertile hydras two-horned. 

 This peculiarity has an important morphological 

 meaning, and seems to indicate that the calyx con- 

 sists of two connate hydrtc, homologous to an 

 undeveloped i>air of hydra;, as observed in Dy- 

 namena. In Amphitrocha the sterile hydra; are 

 more loosely scattered on opposite sides, and the 

 fertile hydra; flask-shaped, the calycles of both 

 being ringled. 



* This genus differs from the other Scrtularida; 

 in having the alternate calycles of tlie sterile hydrie 

 dentate ; the fertile ones are ventricose and slightly 

 ringled, with contr.acted aperture. 



■• The sessile hydrie show this genus to belong 

 to tlie Sertularidie, and not to the Campanularida', 

 to which Hincks refers it. 



