278 ]\rr. E. T. l^rowuc on lli/Jvomrdnscc 



LizzTA, Forbes (1840). 



IMarirelidni with nmrnitial tentacles anancrefl In eij^lit 

 £2:ioups (four perradial and four intenadialj. Oral tentacles 

 simple, unbianclied, with clusters ot" nematocjsts. 



Lizzia formosisHimn, sp. n. 



Umbrella bell-shaped, a little hi<^her than broad, with a 

 slight transverse constriction level with the top of the sub- 

 umbrella-cavity and a solid mass of jelly above it. 



Stomach small, somewhat cubical, about as louf^ as broad, 

 and situated on a broad peduncle about as long as the stomach. 



Mouth with a plain simple margin, rather quadrangular 

 in shape. 



Oral tentacles four, each with seven to eleven clusters of 

 nematocysts, arranged in a double row, with always a single 

 terminal cluster. 



Gonads on the stomach, four interradial roundish swellings 

 or masses. 



Tentacles five in each perradial group and three in each 

 interradial group. 



Size: up to 3 millim. in height and 2^ millim. in width. 



The collection contains twelve specimens showing difterent 

 stages in development. 



The early stages have medusa-buds upon the stomach and 

 only three tentacles in each group. 



IIiprocRENE, Mertens (1829). 



Margelida3 with four perradial groups of tentacle3_, each 

 group with two or more tentacles. Four branched oral ten- 

 tacles, with terminal clusters of nematocysts. Stomach on a 

 ))cduncle, with perradial lobes extending along the peduncle. 

 Gonads upon the stomach and the lobes. 



IJippocrene Mucloviana (Lesson, 1829). 



Umbrella bell-sha|)ed, as high as broad or a little higher 

 than broad, with a quadiangular niaigiii ; longitudinal 

 furrows on the exumbrella. 



Stomach small, cubical, situated on a broad inverted cone- 

 shaped peduncle, and has fournarrow perradial lobes extending 

 along the whole length of the peduncle. 



i\Iouth small, with four short perradial lips, about two 

 thirds down the undjrella-cavity. 



Oral tentacles four, perradial, closely and thickly branched, 



