AURELIA. 127 
The bulk of the colony is made up of ccenosarc, which contains a great 
number of nodular calcareous spicules. These give a tough consistency 
to the colony. 
The colonial habit is found largely amongst the order Hexactinia, 
to which Acfénéa belongs, but the arrangement of the mesenteries and 
the feathered tentacles are characteristic of the order Octactinia. 
V.—AURELIA. 
PHYLUM CaELENTERATA. 
Cass ScyPHOZOA. 
Sus-Cuass ScyPHOMEDUS. 
Fig. 59.—AURELIA AURITA. 
Lateral view. About one-third natural size. 
Aurelia aurita is a large medusa or “ jelly-fish ” about 
the size and shape of a large saucer. It may be found 
swimming in the sea in any numbers during late summer or 
early autumn, supporting itself by rhythmic contractions of 
