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 eea. 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 Agasaiz), 



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 m^uch more delicate, and 

 apparently rarer, species is the common form of 



