216 APPENDIX. 



Campanulaeia syeinga. pi I. fig. 8. 



This Zoophyte twines itself parasitically upon a 

 species of Sertularia. The cells in this species are 

 thrown ont at irregular intervals upon flexible stems 

 which are wrinkled in rings. They consist of length- 

 ened, cylindrical, transparent vases. 



Campanulaeia voltjbilis. PI I. fig. 9. 



A still more beautiful species, with lengthened 

 foot-stalks ringed at each end. The polype is re- 

 markable for the protrusion and contractile power of 

 its lips. It has about twenty knobbed tentacula. 



POLYZOA. 



Among PoLYZOA the animal's body is coated with' 

 a membraneous covering, like that of the Tunicated 

 MoUusca, but which is a continuation of the edge of 

 the cell, which doubles back upon the body in such 

 a manner that when the animal protrudes from its 

 cell it pushes out the flexible membrane just as one 



