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Updated: May 31, 2025
Thus, too, the same power of progressive individuation articulates the tentacula of the polypus and holothuria into antennæ; thereby manifesting the full emersion and eminency of irritability as a power which acts in, and gives its own character to, that of reproduction.
Of Articulates we find only two classes, Worms and Crustacea. Insects there were none, for, as we have seen, this early world was wholly marine.
Pteropods constituted another class in his division of the type of Mollusks; but these animals, again, form only an order in the class of Gasteropoda, as Brachiopods form an order in the class of Acephala. In the third division of the Animal Kingdom, the Articulates, we have again three classes: Worms, Crustacea, and Insects.
In his selection of the epithet Longitudinal, Baer was less fortunate; for all animals have a longitudinal diameter, and this word was not, therefore, sufficiently special. Yet his Longitudinal type answers exactly to Cuvier's Articulates, animals in which all parts are arranged in a succession of articulated joints along a longitudinal axis.
This classification of the lower forms of animal life continued in vogue until Cuvier substituted for it his famous grouping into articulates, mollusks, and radiates; which grouping in turn was in part superseded later in the nineteenth century. What Aristotle did for the animal kingdom his pupil, Theophrastus, did in some measure for the vegetable kingdom.
I was studying where it articulates into the fibula. It's ever so nice. Just see the cunning little grooves." "Booh!" Theodora laughed, even in her disgust. "I am not weak-minded, Babe, but those things do not appeal to me." "Every one to his taste," Phebe said loftily. "I like bones better than Browning, myself. Isabel St. John thinks she will be a nurse."
If you have a 110 volt direct lighting current in your home you can put up this short distance set for very little money and it will be well worth your while to do so. The Apparatus You Need. The Microphone Transmitter. It articulates sharply and distinctly and there are no current variations to distort the wave form of the voice and it will not buzz or sizzle.
The next class in the type of Articulates is that of Crustacea, including Lobsters, Crabs, and Shrimps. It may seem at first that nothing can be more unlike a Worm than a Lobster; but a comparison of the class-characters shows that the same general plan controls the organization in both.
From then on, no more mollusks, no more zoophytes, no more articulates. Just a few large fish sweeping by like shadows. During the night of February 16-17, we entered the second Mediterranean basin, whose maximum depth we found at 3,000 meters. The Nautilus, driven downward by its propeller and slanting fins, descended to the lowest strata of this sea.
I have devoted myself especially to the organization of the invertebrate animals, and to the facts bearing upon the perfecting of their classification. I have succeeded in tracing the same identity of structure between the three classes of radiates, and also between those of mollusks, as has already been recognized in the vertebrates, and partially in the articulates.
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