86 DISCOPIIORiE. Part III 



New Ireland; the Aurelia lineolata (Ocyrtie lineolata, Ptv. and LeS.) from New 

 Holland; the Aurelia colpota Br. from the South Pacific, not far from Cape of Good 

 Hope, and the Aurelia aurita Cham, and Efjs. (not Aud^ from Radack. But an 

 attempt to characterize these species, and define their natural boundaries, would be 

 premature, in the present state of our information respecting their true characters. 

 Their occuri'ence, however, in the localities enumerated, is sufficient evidence that 

 the genus Aurelia is cosmopolite. 



The Aurelia which I have observed along our southern coast differs from that 

 of the northern States in the following particulars. It grows much larger than 

 the northern species, specimens exceeding one foot in diameter being quite pommon. 

 The genital organs are constantly of a pale rose-colored tint in both sexes. But 

 what is far more characteristic, the genital pouches are, proportionally to the size 

 of the body, much larger than in any other species thus far described, occupying 

 at least one half of the whole diameter, so much so, that the distance from the 

 pei"ipheric outline of these organs to the margin of the disk is as great, if not 

 greater, than that to the centre of the disk. The arms, on the contrary, are 

 comparatively small. For this species I propose the name of Aurelia marginalis. 

 I have observed it upon the reefs of Florida. 



