36 THE SUBJECT OF FAUNAL AREAS. 



its southern boundary, the northern boundary of this 

 Fauna " appears to be nearly coincident with the 

 isotheral line of 65 F. It is, however, an extreme- 

 ly irregular line, with abrupt and deep sinuosities. 

 Beginning on the coast to the eastward of Penobscot 

 Bay, it sweeps first somewhat to the northeast, nearly 

 or quite reaching Bangor ; thence passing westward 

 and southward, it follows the northern boundary of 

 the lowlands through southern Maine and southern 

 New Hampshire. In the Connecticut valley it rises 

 farther to the northward, and in its southern descent 

 skirts the eastern base of the Green Mountains, pass- 

 ing to the southward and westward of these highlands 

 in Connecticut, and thence abruptly to the northward. 

 Skirting the eastern border of the Champlain valley, 

 it continues still northward to the valley of the St. 

 Lawrence as far as Quebec. The Alleghanian 

 Fauna hence includes all of southern New England, 

 [except the small piece occupied by the Carolinian, 

 and] except the higher parts of the Green Mountain 

 ranges, including even the southern third of Maine 

 and a considerable part of New Hampshire and Ver- 

 mont." 



V. Canadian Fauna. All of New England, not 

 included in the Carolinian and Alleghanian Faunae, 

 belongs to the Canadian, the northern limit of which 

 coincides very nearly with the isotheral line of 57 F. 



VI. Hudsonian Fauna ; and VII. American Arctic 

 Fauna. Lie successively northward of those already 

 given. Their exact limits, however, need not here 

 concern us. 



It appears from the foregoing that New England in- 

 cludes portions of three of the Faunas marked out 



