Suess divides the Mediterranean basin into four physical regions, which afford probably the best means of description: (I) The western Mediterranean, from Gibraltar to Malta and Sicily, enclosed by the Apennines, the mountains of northern Africa, and of southern and south-eastern Spain (Cordillere betique).
Philippi, Die terti¢ren and quartdren Versteinerungen Chiles (Leipzig, 1887), (includes also descriptions of some Cretaceous fossils), and Los Fo'siles secondarios de Chile (Santiago, 1899); Karl Burckhardt, " Profils geologiques transversaux de la Cordillere argentino-chilienne.
A classification of this flora necessitates La Plata, 1900, and " Beitrge zur Kenntnis der Juraund Kreideformation der Cordillere," Palaeontographica, vol.
Lat.; Leo Wehrli, Cordillere argentino-chilienne, 40° et 41° S.