XX11 SYSTEMATIC INDEX. 



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 Suborder SPHENODONTINA 296 



Family RHYNCHOSAURID^ 296 



Rhynchosaurus articeps 296 



Hyperodapedon gordoni 298 



huxleyi . 299 



Order PROTEROSAURIA 301 



Family PROTEROSAURIDJE 301 



Proterosaurus speneri 302 



Ordinal Position Uncertain 302 



Atoposaurus oberndorferi 302 



