. The Cambridge natural history. Zoology. S@ TRIONYCHIDAE. IH CHELYDIDAE. F16. 72.—Geographical distribution of Trionychidae and Chelydidae. few Testudinidae, does not come into consideration; Asia has at least Testudinidae and Trionychidae, and in addition the solitary Platysternum in Indo-China, representative of a family whose affinities with the Chelydridae again proclaim" the validity of the Periarctic region. Order I. ATHECAE. The mrtebrae and ribs are not fused with, hut are free from, the carapace, which consists of numerous small polygonal plates and is covered with leathery skin
. The Cambridge natural history. Zoology. S@ TRIONYCHIDAE. IH CHELYDIDAE. F16. 72.—Geographical distribution of Trionychidae and Chelydidae. few Testudinidae, does not come into consideration; Asia has at least Testudinidae and Trionychidae, and in addition the solitary Platysternum in Indo-China, representative of a family whose affinities with the Chelydridae again proclaim" the validity of the Periarctic region. Order I. ATHECAE. The mrtebrae and ribs are not fused with, hut are free from, the carapace, which consists of numerous small polygonal plates and is covered with leathery skin without any epidermal shields. The limbs are transformed into paddles. The neck is not retrac- tile. Marine. Fam. Sphargidae.—Sphargis s. Dermatochelys coriacea, the Leathery Turtle or Luth, is the only recent species and is the largest of all recent Chelonians. The biggest specimen in the national collection is about six feet and a half long, from the nose to the end of the shell, which latter is about four feet long ; such a Specimen may weigh half a ton. Agassiz, however, says that he has seen some " weighing over a ; The general colour is dark brown, either uniform or with yellow spots. The Leathery Turtle has a wide distribution, ranging over all the inter- tropical seas, but it is rare everywhere ; least so perhaps in 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
