INDEX TO KEY TO FAMILIES. 



WATER BIRDS. 



Group 1. Toes, four, witii lobate web or web ou sides of toes. See page 11, 



Group 2. Toes, four; front toes, palmate (full webl)ed) ; hind toe, not connected 

 with front ones by web. See page 12. 



Group 3. Toes, four; toto-palniate (all toes full weblied) ; hind toe, connected 

 with front ones by web. See page lo. 



Group 4. Toes, four, not full webbed ; small web between toes at base, or toes 

 entiiely without Aveb ; hind toe, sometimes very small. See page 17. 



Section 1. Hind toe, raised above level of front toes. See page 17. 



Section 2. Ilir.d toe, on same level with front toes. See page 19. 

 Group 5. Toes, three, full \v('l)bed ; no hind toe. See page 21. 

 Group 6. Toes, three, not full webbed; a sm;ill weh between toes at base, or toes 

 entirely without web. Se(! page 23. 



Tio) 



