The club-mosses are all very graceful and beautiful plants. The Spanish moss (Lycopodium denticulatum) is a great ornament to conservatories and hothouses, where it conceals with its luxuriant drapery the mould in the pots, and keeps the roots of the plants moist. Nothing can be lovelier or more elegant than a basket of orchids in full flower, with clusters of this moss in careless grace from its sides. Lycopods may be said to present the highest type of cryptogamic vegetation, the highest limit capable of being reached by flowerless plants. The first pages of the earth’s history reveal to us very extraordinary facts with relation to members and allies of the moss tribe. The club-mosses, in particular, at a former period, seem to have played a more important part, or to have found conditions more suitable to their luxuriant development than is the case at the present day. The two or three hundred species at present existing are the mere remnant of a once magnificent group. Some of them are stated to have formed lofty trees eighty feet high, with a proportionate diameter of trunk. They are among the most ancient of all plants. The oldest land-plant yet known is supposed to be a species of lycopodium closely resembling the common species of the moors. In the upper beds of the Upper Silurian rocks they are almost the only terrestrial plants yet found. In the lower Old Red Sandstone they also abounded; while they occupied a considerable space in the Oolite vegetation. But it is in the Coal-measures that they seem to have attained their utmost size and luxuriance, sigillaria, lepidodendron, etc., being now considered by competent botanists to be highly developed lycopodia. Along with ferns they covered the whole earth from Melville Island in the Arctic regions to the Ultima Thule of the Southern Ocean, with rank majestic forests of a uniform dull, green hue. EUROPEAN SEA-WEEDS --P. MARTIN DUNCAN The zones of life are (1) the littoral zone, or tract between tide-marks; (2) the laminarian zone, from low water to fifteen fathoms; (3) the coralline zone, from low water to fifteen fathoms. Then come other zones leading to the great depths. The broad-leaved tangles live in the laminarian zone, and it is called so from their Latin name, and therefore they limit the plants and animals of the shore, seaward.