TABLE SHOWING THE CLASSIFICATION OF THE SCYPHOZOA 
DESCRIBED IN THIS CHAPTER 
Class 
SCYPHOZOA 
(Velum usually absent and tentaculocysts present ; the eggs are discharged into a 
gastric cavity. The type of this class is Aurelia) 
Orders 
STAUROMEDUSE 
Suborders Genera Species 
(Umbrella conical or 
vase-shaped ; no ten- 
taculocysts ) 
: 
| 
Lucernaria L. auricula 
(Umbrella conical and 
divided by transverse 
constrictions; four 
interradial tentacu- 
locysts) 
CUBOMEDUSE 
(Umbrella four-sided, 
cup-shaped; four per- 
radial tentaculocysts) 
Pericolpa P. quadrigata 
Charybdea C.marsupialis 
DISCOMEDUSE Aurelia A. flavidula 
(Flattened, saucer-like 
or disk-shaped um- 
brella; radial tubes 
branched ; eight ten- 
taculocysts) 
CONNOSTOME 
(Very small; marginal 
tentacles; short and 
solid; mouth square 
without arms) 
SEMOSTOME 
(Square mouth with 
C. arctica 
Cyanea { C. fulva 
four long arms; tenta- C. versicolor 
cles long and hollow) 
Linerges L. mercurius 
RHIZOSTOME Pelagia P. cyanella 
(‘' Root-mouth ") 
Mouth obliterated b: 5 3 
a of oral oe Cassiopeia CC. frondosa 
across it; tentacles ab- 
sent) 
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