EUCOPE ARTICULATA. 



89 



tions. There are from nine to twelve Medusae growing in each calycle 

 at once. 



This species is closely allied to the Camjjanularia gelatinosa of Van 

 Beneden, and to the Cainjjamdaria dichotoma of Dalyell. The details 

 of structure of the Hydrariuni, especially the repi-oductive calycles and 

 the stem of the sterile Hydra, seem to prove that they are difierent 

 species. The mode of branching is the same in Ijoth. Compare Van 

 Beneden, PI. 1, Fig. 1, Campanulaires de la Cote d'Ostende, and the 

 figures of the Medusa) here given. 



Point Judith (fjcidy); Beverly, Massachusetts Bay (Alex. Agassiz); 

 Grand Manan (Mills). 



Cat. No. 74, Beverly, Mass., July, 1861, A. Agassiz. Hydromedusarium. 



Cat. No. 75, Naliant, Mass., July, 1861, A. Agassiz. Hydromedusarium. 



Cat. No. 76, Grand Manan, Aug. 1857, J. E. Mills. Hydrarium. 



Cat. No. 77, Grand Manan, Aug. 1857, J. E. Mills. Hydrarium. 



Eucope articulata A. Aoass. 



This species is so closely allied to Eucope pyriformis that the Me- 

 dusae can hardly be distinguished. The Medusa of Eucope articidata 

 (Fig. 130) has more slender marginal tentacles, and the lips of the 

 actinostome are deeply cleft and extremely movable, which is quite 

 the contrary of what we find in young Medusae of Eucopida?. The 



Fip. 130 



Hydrarium is at once recognized by the extraordinary length of the 

 ringed branch supporting the sterile Hydra3, the cups of which are quite 

 deep and narrow. The reproductive calycle (Fig. 131) resembles in 

 shape that of Ohelia commissuralis, but is in addition supported upon 



Fig. 130. Quarter of the disk of Eucope articulata ; magnified. 

 Fig. 131. Portion of a Hydrarium of Eucope articulata. 

 NO. u. 12 



