VIII CONTENTS. 



LIST OF MAP8 AND ILLUSTRATIONS. 



Page 

 General map on stone ; colored to show general distribution of rocks 



Cliaracter of valley denudations in the cretaceous table laud formation ; upper portion of San Pedro river, Texas- 2 



Eagle Springs - 5 



Section of earthy table land forming the bluffs of the Rio Bravo, above El Paso fi 



View of the initial point on Rio Bravo - 8 



Blountains east of Rio Bravo, seen from El Paso 9 



Banks of the Rio Bravo del Norte, 2 to 3 miles above the mouth of the San Pedro, Texas 28 



"The Bombshell bluff," on the Lower Rio Bravo del Norte 38 



Sectional view of the Bofecillos mountain 51 



Sectional view showing a series of volcanic products 52 



Sectional sketch at Comanche crossing . 54 



Sectional view on a ravine leading towards Eio Bravo, near San Carlos - 54 



Falls of Rio Bravo, near San Carlos 54 



Outline view of the Chisos mountains 56 



Sectional view of the Great Canon, near San Carlos 67 



View of the Presidio de San Vicente and Sierra Carmel 59 



Sectional view of the Valley de los Janos 66 



Valley of " Los Nogales" 67 



Section on the north side of the Cerro de Sonora 69 



Vertical section of the Sierra de la Nariz 72 



South side of the Sierra del Ajo, and part of Cienaga de Sonoyta ' 73 



Pluto- volcanic peaks studding the Mal-pais east of Sierra TiM 75 



Section of Lignite Bluff, near San Diego . 85 



Vertical section of an extinct crater in the tertiary formation, bordering the east slope of the California Cordilleras 92 



View upon the eastern slope of the California Cordilleras from near Carrizo creek 93 



Valley of the Colorado of the west, and east slope of the Sierra Culaya 99 



21 steel plates of palKontology.(See— explanation of plates to Professor Hall's report.) 165 



Note.— I think it pioper to state that I do not concur with Mr. Schott in hia conclusion on page 96, where he says : 

 "From this we have the proof of a former immediate connexion in these latitudes between the two oceans of our globe." 

 In the original proof this conclusion was erased, but by some accident was afterwards inserted. W. H. E. 



Ou page 91, line 41, lor "nearly" read near. 



ERRATA. 



