INDEX TO KEY TO FAMILIES. 

 WATER BIRDS. 



Group I. Toes, four, with lobate web or web on sides of toes. 

 See page 23. 



Group 2. Toes, four; front toes, palmate (full webbed); hind toe, 

 not connected with front ones by web. See page 24. 



Group 3. Toes, four; totipalmate (all toes full webbed); hind 

 toe, connected with front ones by web. See page 27. 



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

 at base, or toes entirely without web; hind toe, sometimes very small. 

 See page 28. 



Section i. Hind toe, raised above level of front toes. See page 28. 

 Section 2. Hind toe, on same level with front toes. See page 30. 

 Group 5. Toes, three, full webbed; no hind toe. See page 32. 

 Group 6. Toes, three, not full webbed; a small web between 

 toes at base, or toes entirely without web. See page 33. 



