g02 GILPIN ON THE EAGLES OF NOVA SCOTIA. 



iimestones, sandstone, shales and conglomerate, were deposited. 

 The crystalline rocks which have been examined, are thus brought 

 into relation with the auriferous rocks of Nova Scotia. The 

 syenites, (diorites and hornblende rocks?) are correlated with the 

 granites ; the argillites, serpentines and marbles with the argillites, 

 quartzites, schists, and ironstones. Cape Breton is thus considered 

 to have a greater extent of metamorphic lower Silurian rock than 

 geologists have heretofore been disposed to concede to it, and of a 

 character which may in no small measure compensate for the proba- 

 ble limitation of auriferous deposits. 



Art. II, On the Eagles of Nova Scotia, By J. Bernard 

 Gilpin, B, A., M. D., M. R. C. S. 



{Read JSTovember 11, 1872.) 



Having, in pursuing the subject of scuteliation on the tarsi of 

 rapacious birds, been led to examine many eagles lately in this Pro- 

 vince, I have thought a short description of the known eagles in- 

 habiting it would be acceptable to the Institute. Although we have 

 a greater variety of Brown Eagles of various shades, or, as they 

 are termed, Gray Eagles, than of any other colour, yet all that have 

 come under my notice may be referred to two species and their 

 young : the eagle of the old world, or the Golden Eagle, and the 

 White-headed or American species. Although many of the brown 

 ones resembled, and even excelled in size the Washington Eagle 

 of Audubon, yet their bills and feet so exactly corresponded to the 

 White or Bald Eagle, that I had to refer them to the young of that 

 species. 



A.quila chrysmtos, (Linn., Richardson, Sclayter.) 



A.quila canadensis, (Linn., Baird.) 



Aquila fulva, (Temminck.) 



Aquila antiquorum, (Cuvier.) 



Ring Eagle and Ring-tailed Eagle of Wilson and various 

 European authors, being the young. 



