PROTOZOA <)U SIMPLEST ANIMALS. 



13 



polar. The radiate spiues give off hurizontal or tangential spinrs orHish Wall 

 plates, which may remain separate (Fig. 0) or may fuse to form a J;]''^- 

 latticed sphere (see Model 13 of Dorataspis diodon in the C51.se). GaUerv*^ 



III. Nassellarla.. The central capsule is conical, and perforatwl 



Fio. 1(1.' 



\\v^>\\^0 



Euci/rtidium cranioidis. Entire animal as seen in tlie living 

 t'ondition. Mai^nified 1.50 diameters. (After Hneckel.) 



only l)y a large opening in the basal rciiion. Eunirtidium (Fig. 1 < and 

 iJidyupodium, see Models 14, in in Case, arc beehive-shaped with throe 

 segments. The yellow balls situated on the pink central capsule repre- 

 sent a symbiotic Alga, commonly found associated with Kadiolaria. 



From " Encyclopnedift Britniinica." 



