Through a splendid arch of dark reddish sienite, marked by horizontal lines of schist, standing nobly out from the cliff, we pass into the next bay, the most magnificent in Serque, _Porte Meullin_. It is a deep wide cave, overfrowned by cliffs of clay shale 300 feet high, that come down perpendicularly on the beach. On their sides and brow _zigzags_ are cut, by which the summit is gained, and from it we look down on the most splendid grouping of the islet. A cleft on the south side of Port Meullin sets off an isolated rock of very quaint form, and leads to another fine cave with chaotic blocks and pools, a lofty pinnacle towering above the cleft, and a wide cavern yawning in the islet rock. These rocks are bronzed by masses of golden gelatine, _laminaria bulbosa_, and _fucus canaliculatus_. Among these ferruginous blocks, _talc_ and _asbestos_ and _agate chalcedony_, green, red, and yellow _jasper_ may be discovered, and veins of _lapis ollaris_ running across the islet. During the western gales—and we now encountered one of the most determined violence—the waves roll into Port Meullin a profusion of the most magnificent algæ or weeds that we have beheld. In a few minutes we selected and displayed on the pebbles half a score of splendid specimens, a complete museum of sea treasure. There was a gigantic flag, six yards long, of rich sienna brown with a fringe of pink, covered with white spots, _laminaria saccharina_, or _sea hanger_. There were the fleshy fans of _nitrophyllum_; long brown ribbon slips six or eight in a bunch, _asperococcus_ and _rhodomenia_; bunches of golden pods or bladders at the end of narrow leaves, _fucus spiralis_; huge bunches of broad reddish leaves, like those of the oak, _delesseria sanguinea_; eight or ten ribbon thongs, six feet long, on a thick brown stem, _laminaria digitata_ (they might be a cat-o’-nine-tails for the backs of the Nereids); filigree weeds of the purest pink and white, _polysyphonia_ and _dasya_; very long, tough, gelatinous brown thongs in a bow, _chorda filum_, sea whip-lash, and the purple _iridea_. The heath brows over this lane are clothed in corresponding luxuriance. There were at least three species of _erica_, a profusion of _spurges_, _aspidia_, and _asplenia_ ferns; _ophioglossum_, adder’s-tongue, and an _adiantum_, maiden-hair fern, and dwarf _polypodium_ were springing from the stunted stems, and little tufts, like _codium bursæ_, green purse-moss, and all these among clumps of _thrift_ and _chicory_, and dwarf thistles, and wild _sage_ and _spinach_, and _vaccinia_. We could not light on the _stramonium_, _wormwood_, or _canna indica_, which we were told now grew wild in the islet.