7. Anthozoa (incl. Hydrocorallia). C. Hydrocorallia. 31 



all the dactylopores may be surrounded by these caps, but in the older and 

 broader stems they may remain naked, the caps being often quite insignificant. 

 The cap forms a protection for the dactylozooid which can no longer be re- 

 tracted into the pore. Later the connection with the canal system becomes 

 interrupted, the dactylozooids die and the caps become covered over with new 

 calcareous matter so that the thicker stems and branches have smooth surfaces; 

 if gastropores and their accompanying dactylopores occur on such stems they 

 are the result of later growth. The author also records Gary ophy Ilia 1 and 

 Desmophyllum 1. - - See also p 25 Marenzeller( 2 ). 



