EXPLANATION OF THE PLATES. 



tion rocks, and also to mark the great difference in the elevation of the youngest 



deposits on the north and south side of the chain*. The colours are modifications 



of those used in the Map, each subformation being distinguished by a tint of the 



colour of the great group of formations to which it belongs. ( Vide Map.) 



The horizontal distances in the detailed sections are proportioned to each other. The 



altitude of the mountains is much exaggerated with relation to the horizontal 



distances, and the culminating peaks of each section have reference only to the 



contiguous valley or river, without any regard to their actual height above the 



sea level. 



R. I. M. 



Plates XXXVIl. XXXVIH. & XXXIX. represent unpublished species of organic 

 remains in the Eastern Alps. 



Gosau. 

 Plate XXXVII. 



Fig. I. Turbinolia aspera. 



Fig. 2. Cyathophyllum rudis. 



Fig. 3. compositum. 



Fig. 4. Astrea grandis. 



Fis^. 5, media. 



Fig. G. Astrea formosissima. 



Fig. 7. 

 Fig. 8. 

 Fig. 9. 



ambigua. 



tenera. 



ramosa. 



Gosau. 



Plate XXXVIII. 



Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 



o. 



4. 



5. 



(). 



7. 



8. 



9. 

 10. 

 11. 

 12. 



Nucula concinna. 

 Pectunculus calvus. 

 Crassatella impressa. 

 Corbula angustata. 

 Gryphaea expansa, p. 349. 



elongata. 



Plicatula aspera, p. 365. 

 Astarte macrodonta. 

 Tornatella gigantea. 

 Auricula decurtata. 

 Natica lyrata. 

 angulata. 



Fig. 16. 

 Fig. 17. 



Fig. 13. Natica bulbiforrais. 

 Fig. 14. Turbo arenosus. 

 Fig. 15. Trochus spiniger. 



Nerinea flexuosa. 



Solarium quadratum. 

 Fis:. 18. Turritella biformis. 



rigida. 



laeviuscula. 



Rostellaria costata. 



plicata. 



Fig. 19. 

 Fig. 20. 

 Fig. 21. 

 Fig. 22. 

 Fig. 23. 

 Fig. 24. 



granulata. 

 laeviuscula. 



* See De Humboldt's new work {Fragmens de Climatologie et Geologie, vol. i. p. 89, note), 

 ill which it is stated, that the plateau of Bavaria is 1560 French feet above the sea, whilst the 

 highest plains of Lombardy are only 480 French feet,— making a diflerence of 1080 French feet 

 as the mean difference of their respective elevations December, 1831. 



