REPORT ON THE RADIOLAPJA. 



CXlll 



171. Hi/pothetical Genealogical Tree of the Acantharia :- 



Diploconida 



Phractopeltida HexalaspiJa 



Phatnaspula 



Coleaspida 

 Ceriaspida I 



Lyclmaspida 



Belonaspida 



Phractatspida 



Stauraspida 



Diporaspida 

 (Dorataspida dipora) 

 I 



Cenocapsida 



Porocapsida 



Astrocapsida 

 Sphajrocapsida 



Tessaraspiila 

 (Dorataspida tetrapora) 



I 

 [Soratagpida] 



Quadrilonchida 



Phractaoantliida 



Araphiloucliida 



Stauracanthida 



I 

 Aoanthonia 



I 



I 



Astroloiichida 



Astrolophida 



Litholophida 



Zygacaiitliida 



Ac:aitlionida 



Acanthometron 



Chiastolida 



Actinastrum 



Acanthocliiasmida 



Acantliometroii 



Actiuelida 

 ActineliuB 



ActiEsa 



(ZOOL. CHALL. ESP. — PART XL. — 1886.) 



Rrp 



