Of all the sea-weeds for an aquarium, the Green Lover is, perhaps, the very best. It is very pretty, from its delicate green color, and the various folds and puckers into which it throws itself. Its power of expiring oxygen seems to be almost unlimited. I have in my aquarium a large plant of this species, which generally lives very contentedly in the place where it had been deposited. But, a few days ago,, the sun shone brightly enough to pierce through the veil of smoke with which the metropolis is generally hidden from his presence, and consequently there was a greater abundance of light than usual. On looking at the aquarium, I found that the ulva had risen in the water, and was hanging in most elegant festoons from the surface, forming emerald caves and grottoes, such as the sea-nymphs would love. Even at a little distance it was a pretty sight, but a closer inspection revealed still more beauties; for, being excited by the unwonted light, the plant had poured forth so much oxygen, that its entire surface was thickly studded with tiny sparkling beads. that had buoyed up the whole plant, each bubble acting as a miniature balloon.

When, however, a black cloud came over the sun, the bubbles soon detached themselves, ascended to the surface, and, as there were no more to take their place, down dropped the plant to the bottom. ( The Common Objects of the Sea-shore, by the Rev. J, G. Wood).

All the Acacias, Mimosas, and, indeed, all the Pea-flowering plants from most parts of the world, will stand a touch of boiling water, and many of them will hardly vegetate without a dip in boiling water, a fact which is as common to gardeners as their pruning knives, but not the leas interesting nevertheless.