PENNATULM. 



183 



the fleshy matter which fills the interior of the common 

 stalk. A cylindrical prolongation of the stalk serves, 

 as in the Pennatula spinosa, for the instantaneous 



Fig. 32. — Sea- pen ^Pennatula spinosa). Fig. 33.'^Veretillum Cynomorium. 



mplantation of the entire colony in the place chosen 

 for its residence. 



