358 



HYDROID.E. 



Part IV. 



9th Family. Plumularid.e Ag? — Sertularidai Johmt. (p. p.). 



Aglaophenia Lamx.^ as restricted by McCrady. — Plumularia Lmk. 

 (p.p.). — Sertularia Lin. (p. p.). 

 A. Pluma Lamx. — Sertularia Pluuia Lin. — Plumularia cristata Lmk. 



— Europe (Ellis). 

 A. trifida Ag. — A. cristata McCr. (non LmJi.). — Charleston, South 



Carolina (McCrady and Agassiz). 

 A. pennatula Lamx., A. myriophyllum Lamx., A. tricuspis McCr., 

 and A. arcuata Lamx., belong also to tliis genus. 

 Plumularia LmJc, as restricted by McCrady. 

 PI. quadrideus McCr. — Charleston (McCrady). 

 PI. setacea Lmk. — Europe (Ellis). 



PI. pinnata Lmk., PI. frutescens Lnnk., PI. Catharina Johnst., belong 

 to this genus, and probably also Laomedea obliqua Sanders. 

 Nemertesia Lamx.^ — Autennularia Lmk. 



N. antennina Z«w?.r. — Autennularia antennina Zw/". — Europe (Ellis). 

 Also N. ramosa Lamx. 



^ HydrK sessile, on one side of the stem. Two 

 kinds of sterile hydr», large ones and small ones, 

 the small ones either in the intervals between the 

 large ones or clustered around them ; besides these, 

 fertile calycles, either simple or compound. The 

 tentacles of the hydrae assume a more or less 

 bilateral symmetry. McCrady has already hinted 

 at the propriety of separating this family from the 

 Sertularida;. Having observed several of these 

 Hydroids alive, I feel justified in carrying out this 

 suggestion. 



- Aglaophenia Lamx., 1812. 

 Aglaophenia, Lamouroux {Sertularia pluma 

 Linn.), Bull. Soc. Phil., Paris, 

 1812, p. 184. 

 " Lamouroux, Hist. Polyj). Flex., 



1816, p. 1G4. 

 " Lamouroux, Exposition Methodique, 



1821, p. 11. 

 Plumularia, Lamarck, Animaux sans Vert., 1816, 

 IL p. 123. 

 .«. Fleming, Brit, Animals, 1828, p. 546. 



" Blainville, Diet. Sciences Nat., 1830, 



LX. p. 441. 



Plumularia, Blainville, Manuel d'Actinologie, 1834- 

 1836, p. 477. 

 " Milne-Edwards, in Lmk. An. sans Vert., 



2d ed., 1836, p. 158. 

 " Johnston, Brit. Zociph., 1838, p. 140. 



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



p. 89. 

 " Sars, Nyt Mag., 18.56, p. 1C3. 



" Alder, Catal. Zooph. North., 1857, p. 28. 



Sertularia, Linnfeus, Fauna Sueciea, 1761, ed. altera, 

 p. 540. 

 " Linnaius, Syst. Nat.. 1767, p. 1306. 



" Pallas, Elenchus, 1766. 



* Nemertesia Lamx., 1812. 

 Nemertesia, Lamouroux (Sertularia antennina 

 Ell.), Bulletin Soc. Phil., Paris, 

 1812, p. 184. 

 " Lamouroux, Hist. Polyp. Flexibles, 



1816, p. 161. 

 " Lamouroux, Exposition Methodique, 



1821, p. 10. 

 Antennularia, Lamarck, An. sans Vert., 1816, p. 122. 

 " Milne-Edwards, in Lmk., An. sans 



Vert., 1836, 2d ed., p. 155. 



