18. The plumose anemone, Metridium senile, may 

 in deep water grow as large as 8 inches tall and 

 5 inches broad; but those found in rock crevices 

 at ordinary tides are usually small or voung speci- 

 mens. (Plymouth, England. D. P. Wilson) 



19. The opelet anemone is another name for the 

 snakelocks, Anemonia sulcata (Plate 14), which 

 at low tide does not withdraw its tentacles but 

 only shortens them as it droops in the sun. (Ros- 

 coft, France. Ralph Buchsbaum) 



