SERTFLARIAD.E. 



141 



Family SERTULARIAD^ Johnst. 



Serlulariadce Johnst. British Zoophytes, p. 57. 



DYNAMENA Lamx. {restr. Agass.). 



Dynamena Lamx. ; in Bull. Sop. Phil. 1812. 



Dymmena Agass. Cout. Nat. Hist. U. S., IV. p. .355. 18C2. 



Dynamena pumila Lamx. 



Di/namcna pumila Lamx. Cor. Flex., p. 179. 



Dynamena pumila Johnst. Brit. Zooph., p. G6. 



Dynamena pumila Agass. Cont. Nat. Hist. U. S., IV. pp. 326, 355, PI. 32. 18G2. 



Dynamena pumila Pack.; in Can. Nat. & Geo]., Dec. 1803. 



Serlularia jiinnila MoRCH ; in Beskriv. af Greenland, p. 97. 1857. 



Serlularia thuja Fab. (teste Moreh). Fauna Groenl., No. 456. 



This is one of the few of our Hydroids (Fig. 225) which have been 

 compared in a Uving state with European specimens sent by Mr. Thos. 

 J. Moore to the Museum, and brought across the Atlantic by Captain 

 Anderson. Professor Agassiz, supposing it to be a distinct sjjecies, had 

 previously given it the name of Dynamena Fabrlcil ; and before he 



had examined the development of the sessile Medusa (Fig. 22G), sup- 

 posed it to be the Hydroid of our 3IeUcerhim camjxmula. See, for the 

 Hydroid of Melicertum, the description of that species. 



European and American shores of Atlantic Ocean (Ellis, Agassiz). 



Cat. No. 163, New Brighton, England, 1860, H. J. Clark. Hydrarium. 



Cat. No. 164, Liverpool, October, 1861, Thos. J. Moore. Ilydromed. 



Cat. No. 165, Lynn, Mass., May, 1852, H. J. Clark. HydronuMlusariuni. 



Cat. No. 160, Nahant, July, 1862, A. Agassiz. Ilydromodusarium. 



Cat. No. 167, Nahant, May, 1862, A. Agassiz. Ilydromedusarium. 



Cat. No. 168, Nahant, July, 1861, A. Agassiz. Ilydromedusarium. 



Fig. 225. Cluster of Dynamena pumila. 



Fig. 226. Magnified portion of stem of Fig. 225. 



