pools; and the slender nature of the body, towards the tail, renders them much more unfit for leaping cataracts than trout and salmon. The temperature of the water, and its character as to still and stream, seem of more importance than clearness; for I have seen grayling taken in streams, that are almost constantly turbid,—as in the Inn and the Salza in the Tyrol. This fish appears to require food of a particular kind, feeding much upon flies and their larvæ, and not usually preying upon small fish, as the trout. It has a very strong stomach, in texture like that of the gillaroo trout, and is exceedingly fond of those larvæ which inhabit cases, and are usually covered with sand or gravel. I once caught a grayling in the Wochain Save, that weighed about a pound and a half, the stomach of which equalled in size a very large walnut, and contained some small shells, and two or three white round pebbles as large as small beans. In accordance with their general habits of feeding, grasshoppers are amongst their usual food in the end of summer and autumn; and at all seasons, maggots, upon fine tackle and a small hook, offer a secure mode of taking them,—the pool having been previously baited for the purpose of angling, by throwing in a handful or two a few minutes before. POIET.—You just now said, that you thought the Lapland fish, considered by Linnæus as grayling, was the same as Back’s grayling; but I find, in the Appendix to Captain Franklin’s narration, two graylings described as belonging to the northern regions,—one the Coregonus Signifer, and another, which appears to differ very little from it, except being small in size. This seems to agree as nearly as possible with our grayling, with a difference of at most one spine in the back fin. May not this in fact be the same fish as the grayling of the Alps, only rendered in a succession of generations fit for a colder climate?