CORALS AND CORAL MAKERS. 



29 



stomachs ; but beyond this there is no individual property. 

 They coalesce, or are one, by intervening tissues ; and there is 

 a free circulation of fluids through the many pores or lacunes. 

 The zoothome is hke a living sheet of animal matter fed and 

 nourished by numerous mouths and as many stomachs. 



MADREPORA ASPERA, D. 



Polyps thus clustered constitute the greater part of the 

 flowering zoophytes of coral reefs. Only a few are simple 

 animals, like the Caryophyllia figured on page 22, or the 

 Thecocyathus, page 23, or the Fungia, page 26. 



This kmd of budding may take place from the sides of the 

 polyp at different heights ; either (i) from the base, as in the 

 Actinia mentioned on page 20 when it is basal ; or (2), above 



