Belonorhynchit, Cladtstia, Sub-class 2. ANOMODONTIA. Orders Pelycosauria, Therapsida. Sub-class 3. CHELONIA, Orders Pleurodira, Cryptodira. Sub-class 4. SAUROPTERYGIA. Orders Nothosauria, Plesiosauria, Placodonta. Sub-class 5. ICHTHYOSAURIA. Sub-class 6. SQUAMATA. Orders Pythonomorpha, Lacertilia, Ophidia. Sub-class 7. RHYNCHOCEPHALIA. Orders Thecodonta, Sphenodontia. Sub-class 8&. CROCODILIA. Orders Eosuchia, Thalattosuchia. Sub-class 9. DINOSAURIA.