. Outlines of zoology. Zoology. 554 AMPHIBIA. The tadpole has by this time grown large and strong while feeding eagerly on water weeds. Now it seems to fast, the tail shrinks, for from it wandering phagocytes carry nourish- ment to other parts of the body. The habit becomes less active, the structural adaptations to the aquatic life disappear. "The horny jaws are thrown off; the large frilled lips shrink up; the mouth loses its rounded suctorial form and becomes much wider; the tongue, previously small, increases considerably in size; the eyes, which as yet have been beneath the skin, bec
. Outlines of zoology. Zoology. 554 AMPHIBIA. The tadpole has by this time grown large and strong while feeding eagerly on water weeds. Now it seems to fast, the tail shrinks, for from it wandering phagocytes carry nourish- ment to other parts of the body. The habit becomes less active, the structural adaptations to the aquatic life disappear. "The horny jaws are thrown off; the large frilled lips shrink up; the mouth loses its rounded suctorial form and becomes much wider; the tongue, previously small, increases considerably in size; the eyes, which as yet have been beneath the skin, become exposed; the fore- limbs appear; the left one being pushed through the spout-. FlG. l88.—Life history of a Frog. (After Brehm.) 1-3. Developing ova ; 4. newly hatched forms hanging to water weeds ; 5-6. stages with gills ; 7-10. tadpoles during emer- gence of limbs ; II. tadpoles with both pairs of limbs ; 12. metamorphosis to frog. like opening of the branchial chamber, and the right one forcing its way through the opercular fold, in which it leaves a ragged ; (Marshall.) While these changes are in progress, and as the supply of food afforded by the tail begins to be exhausted, the tadpole recovers its appetite, but is now carnivorous, feeding on any available animal matter, or even on its fellows. The change. 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 Thomson, J. Arthur (John Arthur), 1861-1933; Newbigin, Marion I. (Marion Isabel), 1869-1934; Smith, Preserved, 1880-1941. fmo. New York, D. Appleton & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
