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(Scyphozoa '), which are, on the whole, larger. These, too, 

 occur l)oth in the sessile, polj'p form, and in the jellyfish form. 

 The sea-anemones are common examples of the polj^p. They 

 are, for the most part, solitary, fleshy creatures, often brilliantly 

 colored, and therefore appropriately called by the Germans 



Fig. 26.J. — jNIotridium, one of our .sea-anemones. Two individuals shown 

 expanded. Photo, of the living animals in the water, by W. H, C. P. 



" sea-roses," and in this country and in England " sea-anem- 

 ones." They are of cyhndrical form, bear a circle of tentacles 

 around the mouth at the u]5pcr end, and have a muscular base 

 by which they attach themselves. They vary in diameter 

 from one-sixth of an inch to two feet. Some species live in 

 the sand, out of which they get some organic food, and at 

 least one species is free-swimming. 



T 1 ^kijphos, cup ; zoon, animal. 



