Zoology. 



517 



tion have not been yet successfully disposed of. The species embraced 

 within the IiTorth American fauua are referred to sixty six families and 

 seventeen orders. These orders, it must be always remembered, have 

 much less taxouomical value than the orders of otiier classes of the ani- 

 mal kingdom, and are in fact probably more nearly of the value of what 

 have been called super-families. It may also be added that the families 

 of passerine birds have been accepted with approximately the limits gen- 

 erally conceded to them, and consequently the species of the passerine 

 group occurring within the limits treated of are referred to as many as 

 twenty families, but of these few have tangible characters. The series 

 of families commences with the three of the order Pj'gopodes and termi- 

 nates with the Passerine. As many as seven hundred and sixty-eight 

 species of birds are recognized as belonging to the North America 

 fauna, and besides these there are numerous subspecies. A so-called 

 "hypothetical list" is added, including the names of twenty-sis species 

 which have been at various times ascribed to the ISTorth American fauna, 

 but which, for various reasons, are now excluded, although some of them 

 may hereafter be legitimately added. 



I. Pygopofles. 



a. Podicipidea. 



1. PodicipidsB. 

 i. Cepphi. 



2. Urinatoridoo. 



3. Alcidae. 



II. Longipennes. 



4. Stercorariida?. 



5. Laridaj. 



6. Rynchopidai. 



III. Tiibiuares. 



7. Diomedeidm. 



8. Procollariida>. 



IV. Steganopodcs. 



9. Pbacthontidaj. 



10. Sulidix>. 



11. Anliingida>. 



12. Phalacrocoracidfo. 

 1.3. Pelecanida^. 



14. FregatidiXi. 



V. Anseres. 



15. Anatida?. 



VI. Odontoglossic. 



16. Phoiuicopterida?. 



VII. Ilerodiones. 

 a. Ihidcs. 



17. Plataleida>. 



18. Ibidida^ 

 h. Ciconia?. 



19. Cicoiiid*. 

 c. Hcrodii. 



20. Ardeida?. 



VIII. Paludicol£e. 



d. Grues. 



21. Gruido). 



e. Ealli. 



22. Araniidse. 

 23.,Ralli*da}. 



IX. Limicoia!. 



24. Pbalaropodida?. 



25. Recurvirostridaj. 

 2G. Scolopacida'. 



27. Cbaradriid;p. 



28. Apbrizidai. 



29. Ilicmatopodida?. 



30. Jacanid;c. 



X. GaliiiiB. 



/. Pbasiani. 



31. Tetraonida>. 



32. Pbasianidaj. 

 g. Penelopes. 



33. Cracidie. 



XI. Cohunba'. 



34. Colnmbidic. 



XII. Raptorca. 



h. Sarcorbampbi. 



35. Cathartida}. 

 i. Falcones. 



.36. Falconida). 

 /. Striges. 



37. Strigida). 



38. Bnbonidai. 



XIII. PsittacidjR. 



39. Psittacida). 



