REPORT ON THE RADIOLARIA. 



CXlll 



171. Hypothetical Genealogical Tree of the Acantharia : 



Diploconida 



Phractopeltida Hexalaspida 



Phatnaspida 



Coleaspida 

 Ceriaspida 



Lychnaspida 



Belonaspida 



Phractaspida 



Cenocapsida 



Porocapsida 



Stauraspida 



Diporaspida 

 (Dorataspida dipora) 



Astrocapsida 

 Sphcerocapsida 



Tessaraspida 



(Dorataspida tetrapora) 



[Dorataspida] 



Quadrilonchida 



Phractacanthida 



Araphilonchida 



Stauracanthida 



Acanthonia 



Astrolonchida 



Litholophida 



Chiastolida 



Actinelida 

 Actinelius 



Actissa 



(ZOOL. CHALL. EXP. PART XL. 1886.) 



Rip 



