222 
THE OCEAN WOULD. 
Such also is R. A IdrovunJi (Fig. 90), which appears all the yea r 
round in calm weather. It is an animal much dreaded by bathers- 
It possesses an urticaceous apparatus, which produces an effect simile 
to the stinging-nettle when applied to the skin. If the animal touches 
the fisherman at the moment of being drawn from the water, it is apt 
to inflame the part and raise it into pustides. 
Fig. 89. Rkizostoma Ouvieri. 
Cassiopea and Cepliea are two other types belonging to the saia e 
group. In Cassiopea Andromeda (Fig. 91), belonging to the first, 
disk is hemispherical, hut much depressed, without marginal tentacle 
or peduncle, but with a central disk, with four to eight half-m° 011 ' 
shaped orifices at the side, and throwing off eight to ten branching 
arms, fringed with retractile sucking disks. Cephea Cycloph of a > 
