THE CCELENTERATA 35 



of the column is called, but the movement is too slow to 

 be noticed. 



In some species numerous young are developed within 

 the body cavity of the parent, and are ejected from the 

 mouth in the form of the adult, except that the tentacles 

 are less numerous. They then speedily affix themselves to 

 the rock. 



Among the species that thus issue their own duplicates 

 are the " Gem anemone " (Bunodes) ; the common " Bead- 

 let " (Actinia) ; the " Sand anemone " (Sagartia), and 

 possibly others perhaps all but I have observed the 

 process in those named. 



We will survey the species which will most likely be 

 met with on the shore. 



The one most in evidence, as it occurs from near high- 

 water level to about the middle zone rarely below is the 

 common " Beadlet " (Actinia mesembryanthemum). (It has 

 other names, but this is the time-honoured one.) 



It is usually of a blood-red colour, although there are 

 some olive-green. When expanded its tentacles form a 

 circle about an inch and a half across, and its column is 

 about an inch in height. When closed, as it is usually seen 

 when the tide is out, unless it happens to be in a pool, it 

 forms a red lump about the size of a walnut. 



It has received its popular name, " Beadlet," on account 

 of its possessing a necklace-like row of bright blue beads 

 just below and around its fringe of tentacles. Its scientific 

 name, Mesembryanthemum, is, on account of its resemblance 

 to the pretty flower of that name, common in gardens near 

 the coast. 



The next in evidence is the " Snake -locked anemone," 

 also called the " Opelet " the first name on account of its 

 long and slender tentacles, the second because, unlike all 

 its relatives, it rarely closes up. Its best-known scientific 

 name is Anthea cereus. 



