Note 2 — Chapter VI · THE ORIENTAL MIGRATION.
Reading edition
In some cases the accuracy of this view is proved by fossil evidence, Helix rotundata, a common and widely spread British species, having been found in miocene strata near Bordeaux.
Reading edition
In some cases the accuracy of this view is proved by fossil evidence, Helix rotundata, a common and widely spread British species, having been found in miocene strata near Bordeaux.