48 TnALASSICOLLID.E. v,^ 



TABLE 

 SHOWING MULLER'S ARRANGEMENT OF 



THE THALASSICOLLID^, POLYCYSTINA, 

 AND ACANTHOMETE^. 



RHIZOPODA RADIOLARIA. 



A. RADIOLARIA SOLITARIA. 



(^Sinrjle.) 



1. Thalassleollina. 



(Animal naked : with or without siliceous spicula.) 



2. Polycystisaa. 



(Animal enclosed in a siliceous, reticulated, shelly covering. ) 



3. Acanthometra. 



(Animal naked: with siliceous radiating spines.) 



B. RADIOLARIA POLYZOA. 



(Aggregated.) 



1. l§pb8erozoiiiidae. 



(Animal naked : with or without siliceous spicula.) 



S. Collospliaeridae. 



(Animal enclosed in a siliceous reticulated covering.) 



