1907. 



AND SUPPOSED SPECIES IN CORALS. 



521 



and each, though highly characteristic as an inherent growth- 

 form for a certain coral, may be assumed by many other corals. 



Text-fiff. 145. 



Vegetative ieproductio;i in Corals. 



Diagram to illustrate reproduction by equal budding : the transverse lines 

 show the surface-level at the time when division took place. 



One method of division that is important among corals with 

 zooids of equal reproductive value, is the type characteristic of 

 the Meandrinae (text-figs. 149, 150). In these corals the com- 

 plete separation of the divided zooids is never carried out by the 

 calcareous partition-walls, and so a more or less linear series of 

 zooid mouths is formed. Tentacles fringe the margins of this 

 series, and the resulting skeleton exhibits those well-known 

 fissure-like markings that have given museinii specimens the 

 name of " brain-corals." 



N'ow even such a highly characteristic type of division as that 

 of the Meandrinse may be assumed by other corals ; and as sports, 



