142 
lonectes n. gen. (Orythia lutea' Q, et Gaim.), Mastigias n. gen. 
(Cephea papua Less.), Himantostoma n. gen. (H. Sueurii n. sp. 
Chin. Küste), Catostylus.n. gen. (Öephea mosaica Q. et Gl 
Wilkesii.n. sp. Illiware-See), Rhacopilus n. gen. (Rh. cyanoloba- 
tus Rio de Jan.), Toxoclytus n. gen. (Rhiz. rosea Less., Cephea 
Dubreuilli Less.), Melitaea Per. et Less., Thysanostoma n. gen. 
(Melitaea brachyura Less. = Th. Lessoni Ag.), Evagora Per. et Less. 
Char. gen. n..Stomolophus Ag. The arms. soldered toge- 
ther for their whole length, forming a large cylindrical tube and 
leaving only a small entrance into its interior between its terminal 
lobes. The upper bunches of the marginal lobes of the arms very- 
long, the lower ones peculiarly formed. 
Char. gen. n. Stylonectes Ag. Eight eonnate arms, each 
ending in a long tricuspidated stylet and bearing a small bunch of 
marginal fringes at the base. i 
Char, gen. n. Mastigias Ag. Eight armes, arising from a 
comparatively narrow actinostome, with a double row of interlocked 
marsinal folds near their base and a long simple terminal ap- 
pendage. 
Char. n. gen. Himantostoma Ag. Eight slender arms, 
arising from a wide actinostome, ruffled with marginal folds for 
their whole length, with the exception of their euspidate termina- 
tion. Fire slicht marginal lobes in each segment, between two of 
the eight, eyes. 
Char. gen.n. Catostylus Ag. The centre of the actinostome 
a widely-spread horizontal flower. 
Char. gen. n. Rhacopilus Ag. Four large pointed lobes in 
each segment between two of the eight eyes. Large actinostome, 
consisting of four pillars, between which are the large openings 
leading ‘into the four genital pouches and from which hang eight 
large arms, covered with numerous folds of the marginal lobes. 
Char. gen. n: Tozoclytws Ag. Eight short arms with cy- 
lindrical: base, widening at their extremity into. broad, arrow-head 
like appendages, bordered with numerous folds of the marsi- 
nal lobes. 
Char. gen.n, Thysanostoma Ag. Eight very long papillate 
arıms, with a.distinet round lobe, projecting outward from their base. 
Fam. Leptobrachidae Ag. Mit sehr langen schlanken Armen, 
die in derNähe ihrer Enden ein kleines Bündel Randfranzen tragen. 
Vier Genitaltaschen. 
Hieher nur das Gen. Leptobrachia Brdt. mit L. leptopus Brdt. 
und Rhizostoma, loriferum Hempr. et Ehrbg. 
Fam. Cassiopeidae Til. Acht Genitaltaschen, die mit den acht 
Armen abwähseln. 
