Having shown this much we have next to deal with the peculiarities of the vast palaearctic subregion.
The genus is confined to the palaearctic and the Nearctic regions.
The entire number of palaearctic families are, according to Newton, 67, and of the genera 323.
Madagascar has seven, and one species just enters the palaearctic.
The Japanese islands exhibit a decided palaearctic fish fauna with a slight influx of tropical forms in the south.
The species of Cervus are fairly distributed between the palaearctic and the Indian regions.
The common crossbill of the palaearctic region (Loxia curvirostra) is about the size of a skylark, but more stoutly built.
palaearctic and palaeotropical with the exception of Madagascar; not in the Australian region.
Towards the north the vegetation is palaearctic, and differs little in its composition from that of Germany, Russia and Siberia.
The mammal fauna of the Indian region of Asia is much more highly developed than that of the palaearctic.