| |and Lake Bruiach in | |Scotland. | | 10. ,, KILLINENSIS |Lock Killin charr |Killin lake in | |Inverness-shire. | | 11. ,, COLII |Cole's charr |Lough Eske and Lough | |Dan, Ireland. | | 12. ,, GRAYI |Gray's charr |Lough Melvin, Leitrim, | |N.W. Ireland. | | {342} 13. COREGONUS CLUPEOIDES |The gwyniad, or |Loch Lomond, Ulleswater, |schelly |Derwentwater, | |Haweswater, and Bala | |lake. | | 14. ,, VANDESIUS |The vendace |Loch Maben, Dumfriesshire. | | 15. ,, POLLAN |The pollan |Lough Neagh and Lough | |Earne, N. of Ireland. These fifteen peculiar fishes differ from each other and from all British and continental species, not in colour only, but in such important structural characters as the number and size of the scales, form and size of the fins, and the form or proportions of the head, body, or tail. Some of them, like _S. killinensis_ and the Coregoni are in fact, as Dr. Guenther assures me, just as good and distinct species as any other recognised species of fish. It may indeed be objected that, until all the small lakes of Scandinavia are explored, and their fishes compared with ours, we cannot be sure that we have any peculiar species. But this objection has very little weight if we consider how our own species vary from lake to lake and from island to island, so that the Orkney species is not found in Scotland, and only one of the peculiar British species extends to Ireland, which has no less than five species altogether peculiar to it. If the species of our own two islands are thus distinct, what reason have we for believing that they will be otherwise than distinct from those of Scandinavia? At all events, with the amount of evidence we already possess of the very restricted ranges of many of our species, we must certainly hold them to be peculiar till they have been proved to be otherwise.