PROCESS-BLOCKS AND OTHER ILLUSTRATIVE FIGURES 

 BESIDES THOSE IN THE PLATES. 



Page 

 Fig. 1. Sketch-map of the district between Mollendo and the 



Inambari River 2 



2. Sketch-map showing the Cretaceous unconformity at 



Lagunillas 28 



3. Horizontal Cretaceous beds lying unconformable on 



folded Jurassic, Lagunillas 30 



4. Cretaceous beds lying unconformably on steeply-inclined 



Devonian quartzites, Taya Taya 34 



5. Geological sketch-map of the Yiscacbani Valley 48 



Pigs. I & 2. Supposititious faunal analysis [Jurassic ammonites] ... G3, 64 



Fig. 1. Comparative rates of extinction of Chinese -North 

 American species and flora as a whole, in Western 

 Europe 150' 



2. Percentage relation between the entire incoming flora 



[Pliocene] and the exotic part of it 154 



Fig. 1. Sections across the beak of the pedicle-valves in Syringo- 

 thyris and other genera 166 



2. The threefold division of the area in Syringothyris 



(diagrammatic) 170 



3. The profiles of Syringothyris and Spirifer distans 178 



4. The profiles of Tylothyris, Spiriferina, and Puncto- 



spirifer 199- 



