f 
145 
of slender tentacles. Sixten bunches öf tentacles arranged in a single 
row in each lobe. The genital pouches are very wide and conceale 
the whole actinostome, with ‘the exception of its central peduncle, 
which hangs below them. Lobes of the margin of the disk angular, 
so that the margin itself appears straight and is only cleft at 
intervals. 
Fam. Pelagidae Gegenb. Scheibe mit zahlreichen kurzen Rand- 
fäden und vier schlanken, an der Basis verwachsenen Armen. Ra- 
diärkanäle weit und ziemlich gleichförmig. Rand mit mehr oder 
minder zahlreichen Lappen. 
Hieher Pelagia Per. et Le S. mit 8 Arten (P. tuberculosa 
Couth. Mscpt. = P. panopyra Brd.), Placois n. gen. (Pelagia dis- 
coidea Esch.), Chrysaora Per. et LeS., Desmonema n.gen. (Chrys. 
Gaudichaudi Less.), Lobocrocis n. gen. (Chr. Blossevillii Less.), 
Dactylometra n. gen. (Chr. lactea Esch. und Pelagia quinque- 
cirra Desor), Polybostrycha Brdt., Melanaster n. gen. (M. Mer- 
tensi Ag. —= Chr. melanaster Brdt.), Zygonema n. gen.- (Pelagia 
volutata Couth. Mscpt., Rio), Nausithoe Köll. (ein Genus, dessen Ar- 
ten Verf. übrigens als junge Pelagien mit beginnender Geschlechts- 
reife betrachten möchte). 
Placois Ag. The margin of the disk being divided into 32 
lobes (not 16 as in Pelagia), between two and two of which alter- 
nate eight eyes and eight tentacles. 
Desmonema Ag. Marginal lobes very large and triangular, 
twelve in number and terminating in twelve fasciculated tentacles. 
Twelve small lobes (eyes 8) alternating with the large lobes. 
Lobocrocis Ag. Margin double lobed; the outer row 
containing twice as many pointed lobes as the inner one, the lobes 
of which are broadly rounded. Tentacles between alternate margi- 
nal lobes. : 
Dactylometra Ag. The margin of the disk is divided in 
48 lobes, sixteen of which are ocular lobes and thirty two tentacu- 
lar lobes, two and two of which are separated by a short tentaecle, 
while there is one large tentacle between the two paires on another 
outside of each pair, so that the total number of tentacles, large and 
small, is 40. 
Melanaster Ag. Forty eight lobes, asin Dactylometra, from 
which it differs in having only three tentakles to each tentacu- 
lar lobe. 
Zygonema Ag. All the segments between the eyes show 
four larger lobes, subdivided by shallow indentations, from which 
arise four 'tentacles. 
Subord. Haplostomeae Ag. Mit weiten Radialtaschen ohne 
