REPORT ON THE RADIOLARIA. 



CV11 



161. Hypothetical Genealogical Tree of the Spumellana: 



Larcoidea 



Streblonida 



Discoidea 



Prunoidea 



Zygartida 



Panartida 



Spongodruppida 



Cypninida 



Soreumida 



Tholonida 



Fhacodiscaria 



Coccodiscida 



Litbelida 

 Phorticida 



Zonarida 



Artiscida 



Spongel- 

 lipsida 



Druppulida 



Spongurida 



Sphseroidea 



Stylosphaerida 



Cyclodiscaria 



Spongodiscida 

 Pylodiscida 



Phacodiscida 



Ellipaida 

 (Cenellipsis) 



[Actipranum?] 



Larnacida 



Larnacilla 

 (Trizonium) 



Larcarida 

 (Oenolarcus) 



[Actilarcus?] 



Pylonida 



Astrosphserida 



Staurosphserida 



Cubosphserida Cenodiscida 



Collosphserida 



Porodiscida 



Archidiscida 



Liosphserida 



(Cenosphsera) 



[Procyttarium] 



Cenodiscida 



(Cenodiscus) 



[Actidiscus?] 



Cenospheera (Common stem-form of all Sphserellaria?) 



Polycyttaria 



Collosphaerida Collozoida Sphcerozoida ) 



Ethmosphaerida 



- Beloidea 



Tlialassosphserida 



Colloidea 



Thalassioollida 



Actissa 



