. Animal forms; a second book of zoology. Zoology. THE AMPHIBIANS 175 plex internal organs adapt the animal to a free-swimming existence for days to come. The tadpole is now, to all intents and purposes, a fiVu— a fact most clearly recognized in its form, method of loco-. Fig. 107.—Metamorphosis of the toad.—Partly after Gage, from Animal L motion, the arrangement of the gills, and the general plan of the circulatory system. 16T. Further growth.—In the course of the next few- weeks hind limbs develop beneath the skin, through which they finally protrude. In the same manner, fore limbs arise at
. Animal forms; a second book of zoology. Zoology. THE AMPHIBIANS 175 plex internal organs adapt the animal to a free-swimming existence for days to come. The tadpole is now, to all intents and purposes, a fiVu— a fact most clearly recognized in its form, method of loco-. Fig. 107.—Metamorphosis of the toad.—Partly after Gage, from Animal L motion, the arrangement of the gills, and the general plan of the circulatory system. 16T. Further growth.—In the course of the next few- weeks hind limbs develop beneath the skin, through which they finally protrude. In the same manner, fore limbs arise at a later date. In position these organs are like the paired fins of fishes, but they are intended for crawling or leaping on land, and are modified in accordance with this need. As in the higher vertebrates, the limbs develop as arms and gs, with long fingers and toes, between which are stretched webs of skin, which serve in 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 Jordan, David Starr, 1851-1931; Heath, Harold, 1868- [from old catalog] joint author. New York, D. Appleton and company
Size: 1796px × 1392px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
