72 CORALLINES. 



neck of the polyp is greatly constricted. A recent 

 tube is marked with several longitudinal pale lines, 

 placed at equal distances, which are evidently caused 



CAMPANULARIA VOLUBILIS. 



"With a Sickle Coralline, so called from its resemblance to that 

 instrument. 



by some structure of the internal pulp, for when 

 empty the tubes exhibit no such appearance. As 

 the animal becomes weak when kept in a basin of 

 sesi water, the head drops off like a flower from the 

 stalk ; and if it is immersed, even when most 



