EEPORT ON THE RADIOLAEIA. 

 180. Hypothetical Genealogical Tree of the Nassellaria. 



CXVll 



Cyrtoidea 



Botryodea 



Pylobotiyida 



Triradiata 

 Podocampida 



Lithobotryida 



Cannoboti'yida 



Stephoidea 



Tympanida 



Coronida 



Eradiata 

 Lithocampida 



I 

 Theocyrtida 



I 

 Scthocyrtida 



Cyrtocalpida 



Podocyrtida 

 Tripocyrtida 

 Tripocalpida 



MuUiradiata 

 Phormocampida 



Phorinocyrtida 

 Anthocyrtida 

 Phaenocalpida 



Tripocalpida 



(Cyrtoidea triradiata mouocyrtida) 



Semantida 



Cyrteilaria 



Stephanida 



Cortiniscus 



Spyroidea 



Androspyrida 



Tholospyrida 

 Phormospyrida 



Zygospyrida 

 (Spyroidea triradiata) 



Cortina 



Plectauiscus 

 Tetraplecta 

 Plectophora 

 Triplecta 



— Cortinida 

 (Cortina) 



Plagoniscus 



Tetraplagia 



Plagiacantha 



Triplagia 



Nassoidea 



(Xassellida) 



Nassella 

 ( Jystidium) 



(Plectellaria) 



I Plectoidea 



I Plectanida 



I 



i- 



Plagonida 



Actissa 



