SQUIRTS, POLYPS, AND JELLY-FISHES. 69 
of favoring conditions prevents the development 
of these interesting animals, which only at com- 
paratively rare intervals may be picked up adhering 
to sheltered pieces of timber or to rocks that have 
been cast into the sea. One of the species occur- 
ring with us is of about the size of a carrot or a 
turnip (Actinia rapiformis), of a pink or light flesh 
color, and with a compound cluster of coarse ten- 
ANEMONE IN DIFFERENT STAGES OF EXTENSION (after Agassiz), 
tacles. The bands that are seen to run up and 
down and across the body are the muscular bundles 
which promote expansion or contraction on the part 
of the animal. When cast up by the waves the 
animal frequently draws itself into a more or less 
globular form, which has been likened to that of 
an onion or a turnip. A much more delicate, and 
apparently rarer, species is the common form of 
