. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. THE REIGN OF MAMMALS. 223 seventy feet, and are undoubtedly the first of the whales in rank as well as in time. This is perhaps one of the most difficult facts to be explained on the theory of evolution. Allied to the whales is the small and peculiar group of the Sea-cows or Diigongf (Sirenians). These creatures, highly specialised and very distinct from all others, appear in the Early Tertiary in forms very similar to those
. The chain of life in geological time [microform] : a sketch of the origin and succession of animals and plants. Paleontology; Paleobotany; Paléontologie; Paléobotanique. THE REIGN OF MAMMALS. 223 seventy feet, and are undoubtedly the first of the whales in rank as well as in time. This is perhaps one of the most difficult facts to be explained on the theory of evolution. Allied to the whales is the small and peculiar group of the Sea-cows or Diigongf (Sirenians). These creatures, highly specialised and very distinct from all others, appear in the Early Tertiary in forms very similar to those which now exist, and probably in much more numerous species, and they pursue. Fig. of Eocene Whale {Ze7,glodon cetioides). One-half natural size. the even tei. of their way down to modern times without perceptible elevation or degradation. " We have questioned," says Gaudry, when speakingof the Tertiary Cetaceans, " these strange and gigantic sovereigns of the Tertiary oceans as to their progenitors—they leave us without ; Their silence is the more significant as one can scarcely suppose t" ?se animals to have been nurtured in anyhmited or secluded space in the early stages of their development. The true Seals,. 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 Dawson, J. W. (John William), Sir, 1820-1899. London : Religious Tract Society
Size: 1122px × 2228px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
