REPORT ON THE RADIOLARIA. 



evil 



161. Hjpothetical Genealogical Tree of the Spumellaria: — 



Larcoidea 



Discoidea 



StreWonida 



Tholonida 



FhacodiBcaria 

 Coccodiscida 



Pninoidea 



Zygartida 



Panartida 



Sorcumida 



Zonarida 

 Lithelida 



Phorticida 



Artiscida 



Spongodruppida 

 Cyphinida 



Spongel- 

 lipsida 



Druppulida 



Spongurida 



Ellipsida 

 (Cenellipsis) 



[Actipninum?] 



Larnacida 



Lamacilla 

 (Trizonium) 



Larcarida 

 (Cenolarcus) 



[Actilarcus!] 



Pylonida 



AstrosphKrida 



Sphseroidea 



StylospliEerida 



Staurosphffirida 



Cyclodiscaria 



Spongodiscida 

 Pylodiscida 



Phacodiscida 



Cubosphierida Cenodiscida 



CollosphEerida 



Porodiscida 



Archidiscida 



Liosphaerida 

 (Cenoaphsara) 



[Procyttarium] 



Cenodiscida 

 (Cenodiscus) 



[Actidisous?] 



CenosphsBra (Common stem-form of all Sphserellaria?) 

 Polycyttaria 



Collosphajrida CoDozoida Sphjerozoida 



Thalassosphserida , 



Ethmosphferida 



Beloidea 



Oolloidea 



Thalassicollida 

 Actissa 



