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GEOLOGICAL BIOLOGY. 



THE CLASSES OF THE ANIMAL KINGDOM AND THEIR GEOLOGICAL RANGE, 

 GROUPED IN BRANCHES ACCORDING TO CLAUS AND SEDGWICK. 



I. Protozoa 



2. Coelenterata 



3. Echinodermata 



4. Vermes 



5. Molluscoidea 



6. MoUusca 



7. Tunicata 



8. Arthropoda 



9. Vertebrata 



f Monera . . 

 i 

 J Rhizopoda . 



[ Infusoria . . 



r Spongia . . 



I Anthozoa 



I Hydromedusa 



[ Ctenophora . 



f Crinoidea 



Asteroidea . 



Echinoidea . 



l_ Holothurioidea 



I Platyhelminthes 



Nemathelminthes 

 ") Gephyrea 



Rolifera . . 

 [ Annelida 

 I Bryozoa . . 

 \ Brachiopoda 

 r Lamellibranchiata 

 J Gastropoda 

 1. Ceptialopoda . 



Tunicata . 

 C Crustacea 

 I Arachnoidea 

 I Myriapoda 

 I. Insecta . 

 C Pisces . . 



Ampiiibia 

 - Reptilia . 



Aves . . 



Mammalia 



