86 



HALF AN HOUR WITH CORALLINES. 



or Sertularians. The bases of the pipes are attached 

 to shells or stones, the pipes themselves being com- 

 posed of the horny material before mentioned. Each 

 pipe is filled with a reddish fluidy flesh, or " coeno- 



Fig. 35. 



Oaten Pipe Coralline. 



sarc," which gives exit at its mouth to a single poly- 

 pite. These polypites are surrounded with tentacles, 

 and are conical, almost resembling rosebuds. Their 



