{137}_Reptiles._--These are comparatively few and unimportant. There are however five snakes and three tortoises which are limited to Canada proper; while further north there are only Amphibia, represented by frogs and toads, and a salamander of the genus _Plethodon_. _Fishes._--Most of the groups of fresh-water fish of the Nearctic region are represented here, especially those of the perch, salmon, and pike families; but there seem to be few or no peculiar genera. _Insects._--These are far less numerous than in the more temperate districts, but are still tolerably abundant. In Canada there are 53 species of butterflies, viz., Papilionidæ, 4; Pieridæ, 2; Nymphalidæ, 21; Satyridæ, 3; Lycænidæ 16, and Hesperidæ 7. Most of these are, no doubt, found chiefly in the southern parts of Canada. That Coleoptera are pretty numerous is shown, by more than 800 species having been collected on the {138}shores of Lake Superior; 177 being Geodephaga and 39 Longicorns. _Greenland._--This great arctic island must be considered as belonging to the Nearctic region, since of its six land mammals, three are exclusively American (_Myodes torquatus_, _Lepus glacialis_, and _Ovibos moschatus_), while the other three (_Vulpes lagopus_, _Ursus maritimus_, and _Rangifer tarandus_) are circumpolar. Only fourteen land-birds are either resident in, or regular migrants to the country; and of these two are European (_Haliæetus albicilla_, and _Falco peregrinus_), while three are American (_Anthus ludovicianus_, _Zonotrichia leucophrys_, and _Lagopus rupestris_), the rest being arctic species common to both continents. The waders and aquatics (49 in number) are nearly equally divided between both continents; but the land-birds which visit Greenland as stragglers are mostly American. Yet although the Nearctic element somewhat preponderates, Greenland really belongs to that circumpolar debateable land, which is common to the two North Temperate regions. _Concluding remarks._--We have already discussed pretty fully, though somewhat incidentally, the status and relations of the Nearctic region; first in our chapter on Zoological regions, then in our review of extinct faunas, and lastly in the earlier part of this chapter. It will not therefore be necessary to go further into the question here; but we shall, in our next chapter, give a brief summary of the general conclusions we have reached as to the past history and mutual zoological relations of all the great divisions of the earth. {139}TABLES OF DISTRIBUTION. In drawing up these tables, showing the distribution of various classes of animals in the Nearctic region, the following sources of information have been chiefly relied on, in addition to the general treatises, monographs, and catalogues used in the compilation of the 4th Part of this work. _Mammalia._--Professor Baird's Catalogue; Allen's List of the Bats; Mr. Lord's List for British Columbia; Brown, for Greenland; Packard for Labrador.