MUSEUM OF COMPARATIVE ZOOLOGY. 



387 



79. ?Chsetura pelasgia. 



80. Antrostomus vociferus. 



81. Antrostomus carolinensis. 



82. Nauclerus furcatus. 



83. Ictinia mississippiensis. 



84. Rosthramus sociabilis. 



85. ?Tetrao canadensis. 



86. Cupidonia cupido. 



87. Ortyx virginianus. 



88. Grus americanus. 



89. Florida cserulea. 



90. Ibis alba. 



91. Platalea ajaja. 



92. JEgialitis Wilsonius. 



93. iEgialitis melodus. 



94. ?Actiturus Bartramius. 



95. Limosa hudsonica. 



96. ?Numenius borealis. 



97. Rallus crepitans. 



98. Porzana jamaicensis. 



99. Porzana noveboracensia. 



100. Gallinula galeata. 



101. Gallinula inartinica. 



102. Anas obscura. 



103. Querquedula discors. 



104. Camptolasmus labradorius. 



105. Sula fiber. 



106. Graculus floridanus. 



107. Plotus anhinga. 



108. Chroecocephalus atricilla. 



3. The Ornithological Faunae of the Eastern Province op 

 the North American Temperate Region. 



Passing to the Eastern Province of the North American Region, the 

 distribution of the birds will be now mainly considered. But a 

 somewhat detailed comparison of the distribution of the represent- 

 atives of this class with the distribution of the mammals and reptiles, 

 and to some extent with the insects, mollusks, and plants, shows that the 

 same divisions apply almost equally well to all. The distribution of 

 plants, however, is everywhere greatly affected by the nature of the soil, 

 as well as by humidity and temperature; and the character of the veg- 

 etation is also intimately connected with the distribution of the insects. 

 The character of the soil, and especially the nature and amount of the 

 mineral matter held in solution in the waters of the streams and lakes, 

 has much to do with the relative abundance and distribution of the ter- 

 restrial and fluviatile mollusca, neither of which influences materially 

 affects the distribution of the birds and mammals. The presence or 

 absence of forests only, in respect to vegetation* and the soil, has much 



* At the junction of the prairies with the eastern wooded districts there is quite an 

 appreciable change in the fauna, especially in respect to the birds and mammals. Tho 

 faunal differences between these regions, in respect to these two classes, result mainly 

 through the addition of a relatively small number of strictly prairie species, the west- 

 ward extension of none of the species of the Eastern Province wholly terminating at 

 this point. The number of their representatives, however, becomes greatly reduced, 

 and their distribution from being general and uniform is restricted to the belU of 



