LAOMEDEA. 93 



LiVOMEDEA L.vmx. 



Laomedea Lamx. ; in Bull. Soc. Phil. 1812. 



Laomedea AoAss. font. Nat. Hist. U. S., IV. p. 352. 18G2. 



Campanularia Lamk. {^p- p-)- An. s. Vert., II. p. 129. 



Laomedea rigida A. Agass. 



This species is remarkable for its peculiar mode of growth. At first 

 glance it would readily be mistaken for a species of Djnamena, so 

 regular is the succession of the hydrte along the stem, and also on 

 account of the absence of branches. The sterile and reproductive hy- 

 dra3 are found on the sides of the main stem, attached Ijy a very short 

 pedicel, and alternate so regularly on each side that its Camj^anularian 

 nature is noticed only after a careful examination. The sterile hydra3 

 resemble those of Laomedea amjihora, while the reproductive calycles 

 are identical in shape with those of Obella commlssuraJis. The main 

 stems of a cluster are closely crowded together, and attain a height of 

 three to four inches. 



Cat. No. 122, San Francisco, Cal., December, 185D, A. Agassiz. Hy- 

 dromedusarium. 



Laomedea amphora Agass. 



Laomedea nmplora Agass. Cont. Nat. Ilist. U. S., IV. pp. 311, 314, Fig. 50; p. 352, Pis. 30, 31, 

 Figs. 1-8. 1862. 



Massachusetts Bay (Agassiz) ; Grand Manau (Mills) ; Long Island 

 Sound (Leidy, A. Agassiz). 



Cat. No.-91, Nahant, July, 1852, H. J. Clark. Hydromedusarium. 



Cat. No. 92, Nahant, July, 1861, A. Agassiz. Hydromedusarium. 



Cat. No. 93, Nahant, July, 18G1, A. Agassiz. Hydromedusarium. 



Cat. No. 94, Nahant, March, ISGI, II. J. Clark. Hydromedusarium. 



Cat. No. 95, Nahant, April, 1855, H. J. Clark. Hydrarium. 



Cat. No. 96, Nahant, 1857, L. Agassiz. Hydrarium. 



Cat. No. 97, Nahant, March, 1856, H. J. Clark. Hydromedusarium. 



Cat. No. 98, Naushon, Sept. 18G1, A. Agassiz. Hydromedusarium. 



Cat. No. 99, Grand Manan, Aug. 1857, J. E. Mills. Hydromedusarium. 



Cat. No. 100, Newport, R. I., S. Powell. Hydromedusarium. 



Cat. No. 101, Newport, R. I., Dr. J. Leidy. Hydromedusarium. 



Cat. No. 102, Boston, March, 1856, II. J. Clark. 



Cat. No. 114, Nahant, Sept. 1854, H. J. Clark. Young ? 



Cat. No. 398, Nahant, July, 1862, A. Agassiz. 



Museum Diagram No. 18, after L. Agassiz. 



