INTRODUCTION. Ill 



"Funicularplatte" Nitsche; " das commuiiale Beweyuni/x- 

 organ" Reichert). A tissue, derived from the endocyst 

 and composed for the most part of fusiform cells, which 

 constitutes the connexion between the polypides in a 

 colony. 



FUNICULUS. A contractile cord, attached to the base 

 of the stomach of the polypide and passing down to the 

 bottom of the cell : a portion of the endosarc. 



PERIGASTRIC CAVITY. The space between the endocyst 

 (or inner wall) of the zooecium and the polypide. 



LOPHOPHORE. The frame or stage surrounding the 

 mouth, which supports the tentacles. 



COMMUNICATION-PLATE (" Rosettenplatte" of Reichert; 

 communication-pore, Smitt). A diaphragm, pierced by 

 one or more minute orifices, occurring in the walls of 

 the adjacent cells amongst the Cheilostomata, and between 

 the internodes and at the base of the zooecia in the 

 Ctenostomata, by means of which communication is 

 maintained between all the cells in a colony and be- 

 tween all the compartments of the stolon. 



OOSCIUM ( = ovicell auctt.). The special receptacle, at- 

 tached to the zooecium, in which the ova complete their 

 development into the larva, in many of the Cheilostomata. 



GONOCYST. The inflation of the surface of the zoa- 

 rium, in which the embryos are developed in certain 

 sections of the Polyzoa. 



GONCECIUM. A modified zooecium set apart for repro- 

 ductive functions*. 



* In the systematic portion of this work, the term oatcium is applied 

 equally to the maraupium of the CHeUoafomata, the modified, reproductive 



