38 



.BULLETIN OF THE BUREAU OF FISHERIES. 



Dysmorphosa futgtiran 



DYSMORPHOSA" Philippi (1842). 

 Dysrnorphosa (?) fulg-urans A. Agassiz. Text cut. 

 V^jtssiz. North American Aealephse, 1865, p. It"'::. Hae'ekel, System der Medusen,1879, p. 77. 



Bell subhemispherical, with a slight conical apical 

 projection; radial canals 4, simple and narrow; marginal 

 tentacles 8 in adult specimens, only 4 in young; sym- 

 metrically disposed; manubrium of medium size, its 

 oral end provided with 4 rather prominent tentacles; 

 secondary medusa- budded from the body of the 

 manubrium in great numbers, this apparently the chief 

 mode of reproduction, as I have not found the sexual 

 products at any time. A. Agassiz says the number of 

 medusa' thus budded becomes so great at times as to 

 afford a splendid phosphorescence. Ontogeny, not 

 known with certainty. 



Colors. — Bell transparent, bases of tentacles and tip 

 of manubrium reddish orange, pigment at base of 

 tentacles probably ocellate in nature. Young medusa buds pale bluish by reflected light. 

 Distribution. — Common generally throughout the region in July ami August. 



Dysmorphogafulgurang. [After A. Agassis 



PODOCORYNE •' Sars 11840). 

 Podocoryne carnea Sars. PI. IV. tig. 5. 



Podocoryne carnea Sars, Fauna Littoralis Norvegise, Tome I, p. I. ls-tt;, Krohn, Archiv fur Naturgeschichte, B>1. XVII, 1851, 

 p. 226. Hi neks. Hriti*h Hydroid Zoophytes, 1868. p. 29. Allman, Monograph Gymnoblastic Hydroids, 1871, p. 349. 

 Dysmorphosa carnea Haeckel, System der Medusen, 1879, p. 77. 



(General form very similar to the preceding species, with which it has been confused, unless upon 

 fuller knowledge of the entire life history it should appear that the two forms are but dimorphic phases 

 of one species. Their occurrence in the same region and season, however, makes this possibility 

 somewhat doubtful. 



Bell hemispherical with low arched aboral portion, entire exumbrella clotted with scattered 

 clusters of nematocysts in young which disappear in the adult; 1 to 3 mm. in height and slightly more 

 than half as broad. Marginal tentacles 4 in young medusa, but 4 additional interradial ones appear 

 early, always remaining shorter than the perradials, however. .Manubrium well developed, usually 

 quadrate in section and with 4 oral tentacles which are tufted with clusters of nematocysts. Gonads 

 borne on base of manubrium and apparently approaching maturity when the medusa is liberated 

 from the hydroid. 



Colors. — Bell very transparent, base of manubrium reddish-brown, gonads pale bluish, bright 

 reddish-brown spots mi perradial tentacular bases, duller ones on the interradials. It is somewhat 

 doubtful whether these pigment spots ate true ocelli. 



Ontogeny. — Derived directly from the hydroid Podocoryne, the life cycle being easily traced on 

 specimens kept in aquaria. 



THstrilnilioii. — Generally the same as the preceding species and during essentially the same season. 



"There can hardly be serious doubt astotheidentityofthe.se genera. Were there certainty as to the hydroid described 

 by I'hilippi, the name Dyxmorphom should have recognition. In view of reasonable doubt on this point and the predomi- 

 nance "f Sars' name in the literature, it seems best to give it right of way. Uncertainty as to ontogeny may warrant the 

 former for Agassiz's species. 





