ACTINOZOA. 



217 



a 



i 



a 



digestive track, a flat ribbon-shaped body, three 

 orfour feet in length, being the result (a). Calli- 



Fig. 39. 





Various forms of Ctenophora : — a, Cesium Veneris ; b, Eu- 

 rhamphcea vexilligera ; c, Beroe rufescens ; d, Callianira triplo- 

 ptera ; e, Pleurobrachia pileus. (a is considerably reduced ; b, 

 slightly so ; c and e are about the natural size : the size of d is 

 uncertain.) 



ani7 



a, a genus of which very little is known, is 

 remarkable for having its ctenophores elevated on 





