96 



Some of the experimental animals could have survived in a sliglillj 

 altered form. Tiiey are the corals, in which new mouths had been 

 formed round the destroyed central part of tiie oral surface. Most 

 specimens however had altered their shape completely : the iiltimate 

 result would ever have been a defunct disc with a number of young 

 living individuals, chiefly on the under surface and at the margin. 

 The " young individuals on the under surface were in unfavourable 

 conditions for further development, although some were already 

 rather large (Fig. 4). The young Fungiae al the marginal regions, 

 would ha\'e developed into a stemmed specimen if the corals had 

 remained on the reef, When their disc has grown to a certain size, 

 it falls olf and at the upper extremity of the stem a new disc forms. 

 These young Fungiae, oi'iginated from the last living residues of a 

 defunct specimen, develop further in the same way as young individuals 

 do, which are generated from fertilized ova. 



Leyden, Jan. J 923. 



Zoological Laboratory of the University. 



