1907, 



AND SUPPOSED SPECIES IN CORALS. 



Text-fie-. 153. 



527 



Vegetative reproduction in Corals. 



Diagrammatic section to illustrate the mode of growth of Madrepores : 

 the " dominant apical zooid" is the oldest member. 



developed normally and abnormally. Pseudo plate-like growths 

 are common, and they are formed by the anastomosis of ntnnerons 

 branches in one plane. Again, the importance of the " dominant 

 apical zooid " is variable, and some types branch more after the 

 type fashion of the Montipores, for a whole apical series of zooids 

 may be symmetrical. 



Having now reviewed, in some measure, the various methods of 

 the formation of the vegetative growth of colonies, it is necessary 

 to see how far these forms of growth are to be reckoned as specific 

 qualities. Here a great difficulty arises, for an enormous amount, 



Proc. Zool. Soc— 1907, No, XXXVT. 36 



