. The story of the amphibians and the reptiles. Amphibians; Reptiles. 132 STORY OF THE REPTILES nsually reaching the breast-bone when that is pres- ent. In many ancient forms the ribs appear short, and there is no evidence of a breast-bone. In croco- dilians and Tuatera the ribs have, near the middle, projections or flat blunt §purs (uncinate processes) which reach back and lap over the next rib, thus strengthening the bony cage. The lower birds also have this. In tortoise-forms the ribs are usually fused into the shell and are broad and flattened. In one case,. Fici. 61.—Tortoise-shell turtle
. The story of the amphibians and the reptiles. Amphibians; Reptiles. 132 STORY OF THE REPTILES nsually reaching the breast-bone when that is pres- ent. In many ancient forms the ribs appear short, and there is no evidence of a breast-bone. In croco- dilians and Tuatera the ribs have, near the middle, projections or flat blunt §purs (uncinate processes) which reach back and lap over the next rib, thus strengthening the bony cage. The lower birds also have this. In tortoise-forms the ribs are usually fused into the shell and are broad and flattened. In one case,. Fici. 61.—Tortoise-shell turtle (hawkbill) (Ereimochelys imbricata). however, the sea-turtle (Sphwrgis), the ribs are free from the shell but much flattened. It has been claimed that the tortoise-forms ha^^e no true ribs, but that those apparent are merely the spiny projections of the. 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 Baskett, James Newton, 1849-; Ditmars, Raymond Lee, 1876-1942. joint author. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectreptile, bookyear1902
