xliv Phi/sical and Geognostk Siff/gestions, 



(43° 12' S.), 70i6 feet ; Yanteles or Yntales (43° 29' S.), 7534 

 feet ; and the Volcan de San Clemente, opposite the granite 

 formation on the peninsnla of Tres Montes. Still further 

 south, in 51° 41' S., another, the Volcan de los Gigantes, is 

 laid down on the old maps of South America, by La Cruz, as 

 opposite the archipelago of La INIadre de Dios. 



Should the Novara return to Europe through the Straits of 

 Maghellanes, it would be very desirable the members of the 

 Expedition should visit the locality from which Prince Paul of 

 Wiirtemberg, after long zoological travels through North 

 America, has, within the last year, brought back to Ger- 

 many a very large collection of specimens. 



Altogether, I calculate the number of active volcanoes on 

 the surface of the earth to be upwards of 225 — one-tliird of 

 which, or 75, are upon the various continents, and the re- 

 mainder upon the insular world. The Western Continent 

 has 53 active volcanoes — of which. North- Western America, 

 north of the river Gila, has 5 ; Mexico, 4 ; Central America, 

 18 ; South America about 26. Viewing the globe as a whole, 

 there presents itself an extensive oblique region in which 

 volcanoes most abound, stretching from S.E. to N.W. in 

 the more westerly part of the Pacific, between 75° W. and 

 125° E. of Paris, and between 47° S. and 66° N. In this 

 region, the fused elements of the interior of our earth may 

 be said to be most permanently in communication with the 

 atmosphere. 



The greatest attention should be paid, with the view of 



