...division of this zone, known as the Alleghanian Fauna, covers the greater part of New England .... and extends westerly over the greater part of New...interval between the Upper Sonoran and Boreal Zones. "* The Alleghanian Zone is beyond question a transition belt, being necessarily so from its geographical...

...Pennsylvania, and sends an arm south along the Alleghanies all the way across the Virginias, Caroliuas, and eastern Tennessee, to northern Georgia and Alabama....passes broadly over the well-known low divide of the Eocky Mountains, which affords the route of the Union Pacific Railway, and is directly continuous with...

...including parts of western South Dakota and Nebraska, and forms a belt along the eastern base of the Eocky Mountains in Colorado and northern New Mexico, here...elsewhere occupying the interval between the Upper Sonorau and boreal zones. In Wyoming the transition zone passes broadly over the well-known low divide...

...westerly across southern Michigan and Wisconsin, and then curves northward over the prairie-region of Minnesota, covering the greater parts of North...occupying the interval between the Upper Sonoran and Canadian zones. " In Wyoming the Transition zone passes broadly over the well-known low divide of the...

...westerly across southern Michigan and Wisconsin, and then curves northward over the prairie-region of Minnesota, covering the greater parts of North...occupying the interval between the Upper Sonoran and Canadian zones. " In Wyoming the Transition zone passes broadly over the well-known low divide of the...

...including parts of western South Dakota and Nebraska, and forms a belt along the eastern base of the Eocky Mountains in Colorado and northern New Mexico, here...Wyoming the transition zone passes broadly over the \vell-known low divide of the Eocky Mountains, which affords the route of the Union Pacific Eailway,...