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Updated: May 20, 2025
For instance, whether or not there is an open passage from the nostrils to the mouth, the only character, according to Owen, which absolutely distinguishes fishes and reptiles the inflection of the angle of the jaws in Marsupials the manner in which the wings of insects are folded mere colour in certain Algae mere pubescence on parts of the flower in grasses the nature of the dermal covering, as hair or feathers, in the Vertebrata.
Thus, then, the chemical composition, as well as the structure and mode of division of these yellow cells, are those of unicellular algae, and I accordingly propose the generic name of Philozoon, and distinguish four species, differing slightly in size, color, mode of division, behavior with reagents, etc., for which the name of P. radiolarum, P. siphonophorum, P. actiniarum, and P. medusarum, according to their habitat, may be conveniently adopted.
At the Mammoth Hot Springs in the valley of the Gardiner River, Yellowstone National Park, beautiful terraces and basins of travertine are now building, chiefly by means of algae which cover the bottoms, rims, and sides of the basins and deposit lime carbonate upon them in successive sheets.
The kingly Sugar Pine, towering aloft to a height of more than two hundred feet, offers a fine mark to storm-winds; but it is not densely foliaged, and its long horizontal arms swing round compliantly in the blast, like tresses of green, fluent algae in a brook: while the Silver Firs in most places keep their ranks well together in united strength.
An adventure soon occurred which brought me once more among my fellow-creatures. One day, as I was gathering lichens and algae on the northern coast, with the drag on my boots, a bear suddenly made his appearance, and was stealing towards me round the corner of a rock.
The former owes its color to a green pigment diffused chiefly through the ectoderm, but has comparatively few algae in its endoderm; while in the latter the pigment is present in much smaller quantity; but the endoderm cells are crowded by algae.
They were huge stacks of stones in which you could distinguish the indistinct forms of palaces and temples, now arrayed in hosts of blossoming zoophytes, and over it all, not ivy but a heavy mantle of algae and fucus plants. But what part of the globe could this be, this land swallowed by cataclysms? Who had set up these rocks and stones like the dolmens of prehistoric times?
While a few of the rivers were in a nearly chemically pure state, most of them were already filling with the plankton and algae that would form the base of the major ecological experiments, some with fresh water as their medium, others using sea water, complete with its normal micro-organisms supplemented from the tanks of concentrate that Dr. Millie Williams had brought aboard.
In the open ocean, northward of the frozen zone, this order, though no doubt almost universally present, generally eludes the search of the naturalist; except when its species are congregated amongst that mucous scum which is sometimes seen floating on the waves, and of whose real nature we are ignorant; or when the coloured contents of the marine animals who feed on these Algae are examined.
Against the walls Tom could see the great hydroponic vats that held the yeast and algae cultures that fed the crew of the ship. Water was splashing in one of the vats, and there was a gurgling sound as nutrient broth drained out, to be replaced with fresh. He moved swiftly across the compartment, into a darkened area behind the rows of vats, and crouched down.
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