Such a rhapsody may be somewhat out of order, even in a popular scientific book; and yet one cannot help at moments envying the old Greek imagination, which could inform the soulless sea-world with a human life and beauty. For, after all, star-fishes and sea-anemones are dull substitutes for Sirens and Tritons; the lamps of the sea-nymphs, those glorious phosphorescent medusæ whose beauty Mr. Gosse sets forth so well with pen and pencil, are not as attractive as the sea-nymphs themselves would be; and who would not, like Menelaus, take the grey old man of the sea himself asleep upon the rocks, rather than one of his seal-herd, probably too with the same result as the world-famous combat in the Antiquary, between Hector and Phoca? And yet—is there no human interest in these pursuits, more humanity and more divine, than there would be even in those Triton and Nereid dreams, if realized to sight and sense? Heaven forbid that those should say so, whose wanderings among rock and pool have been mixed up with holiest passages of friendship and of love, and the intercommunion of equal minds and sympathetic hearts, and the laugh of children drinking in health from every breeze and instruction at every step, running ever and anon with proud delight to add their little treasure to their parents’ stock, and of happy friendly evenings spent over the microscope and the vase, in examining, arranging, preserving, noting down in the diary the wonders and the labours of the happy, busy day. No; such short glimpses of the water-world as our present appliances afford us are full enough of pleasure; and we will not envy Glaucus: we will not even be over-anxious for the success of his only modern imitator, the French naturalist who is reported to have fitted himself with a waterproof dress and breathing apparatus, in order to walk the bottom of the Mediterranean, and see for himself how the world goes on at the fifty-fathom line: we will be content with the wonders of the shore and of the sea-floor, as far as the dredge will discover them to us. We shall even thus find enough to occupy (if we choose) our lifetime. For we must recollect that this hasty sketch has hardly touched on that vegetable water-world, which is as wonderful and as various as the animal one. A hint or two of the beauty of the sea-weeds has been given; but space has allowed no more. Yet we might have spent our time with almost as much interest and profit, had we neglected utterly the animals which we have found, and devoted our attention exclusively to the flora of the rocks. Sea-weeds are no mere playthings for children; and to buy at a shop some thirty pretty kinds, pasted on paper, with long names (probably mis-spelt) written under each, is not by any means to possess a collection of them. Putting aside the number and the obscurity of their species, the questions which arise in studying their growth, reproduction, and organic chemistry are of the very deepest