CXX1V 



THE VOYAGE OF H.M.S. CHALLENGER. 



194. Hypothetical Genealogical Tree of the Phceodaria : 



Phseoconchia 

 Phseosphseria Cceloplegmida 



Anlarida 



Anlonida 



Coelotholida 



Ccelographida 



Aulosphserida 



Sagmarida 

 Cannosphserida 



Conchopsida 



Conchasmida 

 Concharida 



Oroscenida 



Concl arida 



Sagenida 



Sagosphserida 



Oronida 

 Orosphserida 



Phieodinida 



Pheeocystina 



Aulacanthida 



(^annobelida 



Catinulida 



Dictyochida 



CannorrhapliiJa 



Phaeogromia 



Coelodrymida 



Coelodorida 



Coelodendrida 



Tuscarorida 



Castanellida 



Ilaeckelinida 

 Circogonida 



Circoporida 



Gazellettida 



Pharyngellida 



Euphyeettida 



Medusettida 



Lithogromida 



Challengerida 



idinid 



Phajodinida 



Phffiodinida 



Phseodina 

 (Phaometra) 



Actlssa 



