50 CORALS AND CORAL L8LANDS. 



rising stem is formed with one parent polyp at the extremity 

 of the stem, and a terminal corallet to the corallum, or to each 

 branch of it. This is the case in the genus Madrepora, a 



MADKErORA ASPERA, D. 



species of which is here represented. Each branch in the 

 living state had at its extremity the parent polyp of the 

 branch, or that whose budding made the other polyps of the 

 branch. In such species, a new lateral branch is commenced 

 by one, among the many polyps over the surface of a branch, 

 beoinnins to grow and bud. Thus branch after branch is 



o o o 



added, and the little tree produced. 



Another kind of coral, growing and budding in the same 

 manner, is represented on page 51. It is a species of Dendro- 

 phyllia, from the Feejees — a genus often presenting tree-like 

 forms, as the name implies. 



In other cases, budding goes on until a cluster of some size 



