. Zoology for high schools and colleges. Zoology. Fig. dl.—Antedon, stalked and free.—From Macallister. Next appears a hollow sheath of parallel calcareous rods, bound, as it were, in the centre by the calcareous plates. This stalk {B, c) arises on one side of the digestive cavity of the larva, and there is no connection between the body- cavity of the larva and that of the embryo crinoid. Two or three days after the appearance of the plates of the crinoid, the larva begins to change its form. The mouth and digestive cavity disappear, not being converted into those of the crinoid. The larva si
. Zoology for high schools and colleges. Zoology. Fig. dl.—Antedon, stalked and free.—From Macallister. Next appears a hollow sheath of parallel calcareous rods, bound, as it were, in the centre by the calcareous plates. This stalk {B, c) arises on one side of the digestive cavity of the larva, and there is no connection between the body- cavity of the larva and that of the embryo crinoid. Two or three days after the appearance of the plates of the crinoid, the larva begins to change its form. The mouth and digestive cavity disappear, not being converted into those of the crinoid. The larva sinks to the bottom, there resting on a sea-weed or stone, to Avhich it finally ad- heres. Tlie Pentacrinus form is embedded in the larval body. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
