MEDl•S.^<:. I. jQ- 



Seasonal occurrence: Off tlie British coasts large specimens are found during the autumn 

 and winter, apparently not later than the end of January; according to Mcintosh young speci- 

 mens have been foniul in February, May, and August. — In the Danish waters quite \oung specimens 

 have been found in June and July; large specimens occur during the winter and early spring from 

 November to April, rarely in May. 



: Family >Cquoridae. 



Genus /Equorea Feron et Lt'sueur. 

 y^quorea forskalea Per on et Lesneur. 



Mayer 1910, Medusa; of tlie World, p. 325. 



Umbrella usually flatter thau a hemisphere, up to about 400 uiiii wide; ,t;elatinou.s substance thick in the middle part. 

 thin at the margin. Stomach wide, mouth usually widely gaping, with several pointed lips. Numerous simple radial canals 

 (up to about 200), carrjing the gonads. Numerous tentacles of varying length. No cirri Marginal vesicles even more numerous 

 than tlie tentacles, each containing 2 — 4 concretions. Colour highly variable. 



The species is widely distributed, but the distribution cannot be stated exactly, because we are not yet able to esta- 

 blish the hmitations between the different species or variaties of .Kquorrn described. It has been found off the Atlantic coasts 

 of Great Britain and the northern part of Norway. 



Genus Zygodactyla Brandt. 

 Zygodactyla groenlandica (Peron et Le.sueun. 



Mayer 1910, Medusae of the World, p. 335. 



Umbrella usuallv flatter than a hemisphere, large; gelatinous substance very thick in the middle part, thin at the 

 margin. .Stomach broad, flattened, with a prolonged, cylindrical mouth-tube; the mouth is provided with long, pointed lips, 

 equal in number to the radial canals. About 100 simple radial canals, carrying the gonads; between each successive pair of 

 radial canals the subumbrella carries a row of gelatinous, wart-hke protuberances. Tentacles slightly more numerous than the 

 radial canals, long, with tapering bulbs. Between each successive pair of tentacles there are about S-12 marginal vesicles, 

 each containing 2 concretions. There are no cirri. Velum rudimentary. Colour of gastro-genital system and tentacles ver)' 

 delicately pink. 



East coast of North .\merica and west coast of Greenland. 



14* 



