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Updated: June 24, 2025
In the short period of a few weeks or months, the changing forms of the embryo and larvae will pass before us, a more or less complete and more or less true picture of the transformations through which the species, in the course of untold thousands of years, has struggled up to its present state. With a barbate opercular peduncle, Filograna-stage;
If, then, in cases where we can test it, we find no concomitant variation in co-operative parts that are near together if we do not find it in parts which, though belonging to different tissues, are so closely united as teeth and jaws if we do not find it even when the co-operative parts are not only closely united, but are formed out of the same tissue, like the crab's eye and its peduncle; what shall we say of co-operative parts which, besides being composed of different tissues, are remote from one another?
The interior is scarcely less attractive, the nacre having a pink and bluish lustre, while the "lip" is dark red. Apart from the unusual shape and pleasing colours of the shell, it is remarkable because it seems to be actually incorporated with its host. The foot of the mollusc is extended into a peduncle, consisting of fibres and tendons, by which the animal is a fixture to a spur of coral.
"That water finds its way by preference through the fibro-vascular bundles even in the more delicate parts, is shown by placing the cut peduncle of a white tulip, or other large white flower, in a harmless dye, and then again cutting off its end in order to bring a fresh surface in contact with the solution, when after a short time the dye will mount through the flower-stalk and tinge the parts of the perianth according to the course of the bundles."
The light brown berry, is the fruit of a tree about the size shape and appearance in every rispect with that in the U. States called the wild crab apple; the leaf is also precisely the same as is also the bark in texture and colour. the berrys grow in clumps at the end of the small branches; each berry supported by a seperate stem, and as many as from 3 to 18 or 20 in a clump. the berry is ovate with one of it's extremities attatched to the peduncle, where it is in a small degre concave like the insertion of the stem of the crab apple.
Then seizing it in its jaws, and fixing its hind legs firmly as a pivot, it contrives to turn round and round, and so to strain the fibres of the fruit-stalk until they snap; it then patiently backs down the stem. Sometimes two ants combine their efforts; one, at the base of the peduncle, gnaws at the point of greatest tension, while the other hauls upon it and twists it.
This Lepadide, which lives upon Sharks in the North Sea, seems, in fact, to be in the best way to lose its cirri and buccal organs in the same manner. The widely-cleft, shell-less test is supported upon a thick peduncle, which is immersed in the skin of the Shark. Darwin looked in vain for cement-glands and cement.
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