Palaearctic

Having shown this much we have next to deal with the peculiarities of the vast Palaearctic subregion.

The entire number of Palaearctic families are, according to Newton, 67, and of the genera 323.

Towards the north the vegetation is palaearctic, and differs little in its composition from that of Germany, Russia and Siberia.

Nor can it be convincingly asserted that the extra-Palaearctic Lumbricids are real indigenes of those—often tropical—countries.