SCHEME OF THE CLASSIFICATION xxiii 



PAGE 



Class V. REPTILIA 527 



Order i. TESTUDINATA 540 



" 2. RHYNCHOCEPHALIA 546 



" 3. CROCODILINI 547 



" 4. SQUAMATA 550 



Class VI. AVES 575 



Subclass i. Archaeornithes 593 



'' 2. Neornithes 594 



Order i. HESPERORNITHIFORMES 594 



" 2. ICHTHYORNITHIFORMES 594 



" 3. STRUTHIONIFORMES 595 



" 4. RHEIFORMES 596 



" 5. CASUARIIFORMES 596 



" 6. CRYPTURIFORMES - . 596 



" 7. DlNORNITHIFORMES 597 



" 8. ^PYORNITHIFORMES 598 



" 9. APTERYGIFORMES 598 



' 10. SPHENISCIFORMES 598 



" II. COLYMBIFORMES 599 



" 12. PROCELLARIIFORMES 600 



" 13. ClCONIIFORMES 6oi 



" 14. ANSERIFORMES 602 



" 15. FALCONIFORMES 603 



u 16. GALLIFORMES 606 



" 17. GRUIFORMES 606 



" 18. CHARADRIIFORMES 607 



" 19. CUCULIFORMES 6lO 



" 2O. CORACIIFORMES 6lO 



" 21. PASSERIFORMES 614 



Class VII. MAMMALIA 632 



Subclass I. Prototheria 642 



Order i. MONOTREMATA 645 



Subclass II. Eutheria 642 



Division I. DIDELPHIA 642 



Order i . MARSUPIALIA 647 



Division II. MONODELPHIA 642 



Section A. Unguiculata 642 



Order i. INSECTIVORA 649 



" 2. DERMOPTERA 642 



