. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. REPTILES cerning these flying creatures. Here conditions were so favorable to their preservation that skeletons have been found intact, with impressions in the rock of the wing membrane itself. Sometimes this membrane is stretched to its full reach, giving the entire contour of the wings (Plate 59). A specimen of Rhamphorhynchns in the Na-. FiG. 72. Restored skeleton of Pteranodon measuring twenty-five feet from wing tip to wing tip. After Eaton tional Museum shows the impressions of the partially folded wings, and the e
. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. REPTILES cerning these flying creatures. Here conditions were so favorable to their preservation that skeletons have been found intact, with impressions in the rock of the wing membrane itself. Sometimes this membrane is stretched to its full reach, giving the entire contour of the wings (Plate 59). A specimen of Rhamphorhynchns in the Na-. FiG. 72. Restored skeleton of Pteranodon measuring twenty-five feet from wing tip to wing tip. After Eaton tional Museum shows the impressions of the partially folded wings, and the extremity of the tail is extended vertically into a leaf-shaped appendage which, like the tail of a boy's kite, may well have acted as a rudder in the flight of the ani- mal. The great ani- mated flying ma- chine known as Pteranodon (Figs. 72 and 73), whose fossil remains oc- cur in the Chalk beds of western Kansas, must have abounded on the shores of the great sea which covered that region in Cretaceous times. A single wing of this reptile measures more than ten feet in length. Despite [266]. 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 Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Whitney, 1874-; Cochran, Doris M. (Doris Mable), 1898-1968. [New York, Smithsonian institution series, inc. ]
Size: 2680px × 932px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubj, booksubjectfishes, booksubjectreptiles
