94 POPULAR HISTORY OF THE AQUARIUM. 



Adherent Actiniadce with retractile tentacles have the ten- 

 tacles knobbed^ truncated^ or conical, and are divided 

 into the following genera : — 



1. Tentacles knobbed. — Corynactis. 



2. Tentacles truncated. — Capnea. 



3. Tentacles conical. — 



Emitting filaments. — Sagartia. 

 Tsot emitting filaments : — 



Warted : Bunodes. Smooth : Actinia. 

 Non-adherent Actiniadce are divided into the following 

 genera : — 



1. Body tapering downwards; tentacles simple, 

 equal, retractile. — Hyanthis. 



2. Body cylindrical, with a rounded base; tentacles 

 non-retractile, those of the outer circle long and 

 those of the inner circle short. -^Arachnitis. 



3. Body worm-shaped ; animal forming a protective 

 sheath. — JEdwardsia. 



4. Body pear-shaped, with a posterior orifice. — 

 Peachia. 



Each of these genera will be more fully described when 

 studying their representative species in the following 

 Chapter. 



