30 



ZOOPHYTA. 



A. mesembryanthemum. Fig. 43. 

 margaritifera. 

 chiococca. 



43 



44 



Ilyanthus (Forbes). Body not adherent, tapering 

 to a point below; tentacles simple, retractile; 

 anterior extremity normal ; no posterior orifice. 



I. Sections. 



Mitchellii. Fig. 44. 



Arachnactis (De Blainville). Body adherent or 

 free at will, cylindrical with a rounded base ; mouth 

 surrounded by non-retractile tentacles (about 16) 

 in two series, the outer ones very long, the inner 

 short: it either swims like a Medusa, or adheres 

 in deep water. 



A. albida. Fig. 44*. 



