142 CLASSIFIED KEY TO THE INDEX. [bull. 
Pa 
Tertiary 
Alaska 
Atlantic coast region 
Great Basin region 
Great Plains region 
Gulf region 
Mexico 
Mississippi Valley region 
New England and New York 
Ohio Valley region 
Pacific coast region 
Rocky Mountain region 
Southwestern region 
( reneral 
T» sxas 
Trias 
Alaska 
Atlantic coast region 
Great Basin region 
( i reat Plains region 
Pacific c<»a>t region 
Rocky Mountain region 
Southwestern region 
Utah , 
Vermont 
Virginia 
Washington 
Wesl tndies 
Wesl Virginia 
Wisconsin 
Wyoming 
Miscellaneous I not indexed elsew here) 
I 
