ACTINIAD.E. 



29 



missile filaments; nettling-threads long and simple; 

 tentacles generally thick, conical, obtuse. 



B. gemmacea. 

 thallia. 

 clavata. 

 crassicornis. Fig. 42. 



B. ? monile. 



? chrysoplenum. 

 ? alba. 

 ? miniata. 



Actinia (Linn.). Body adherent, cylindrical ; 

 destitute of warts, of pores, and of missile fila- 

 ments; skin smooth; a series of capsuliferous 

 spherules at the margin of the disk. 



