Phases of animal life, past and present

Paperback | October 12, 2012

byRichard Lydekker

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...like that of the wing of a bat; and it is quite evident that there were no feathers either on the body or the wings. The body, like the wings, was, indeed, in all probability entirely naked; and this circumstance militates against the suggestion that the Flying Dragons were warm-blooded creatures, since a protection of either fur or feathers is found necessary in the case of birds and bats to maintain their high temperature. The Ehamphorhynchs occur not only in the Lithographic limestone, which is situated near the top of the great Oolitic system--the system underlying that of the Chalk--but are also found in the older Lias. Another group, also found in the Lias, are characterised by their short skulls and the superiority in size of the front over the hinder teeth, in consequence of which they are known as Dimorphodonts. Perhaps, however, the most remarkable forms found in the whole group are the toothless types, or Pteranodonts, of which a skull is shown in Fig 45. In these creatures teeth were totally wanting, and the jaws were probably sheathed in horn, like those of tortoises, while the hinder or occipital region of the skull was produced into an enormous flattened spine, which also recalls a feature found in the tortoises (see Fig. 31, page 107). Whereas most of the forms we have hitherto noticed did nob exceed a rook in size,, some of the Pteranodonts were of enormous dimensions, one of them having a skull measuring upwards of four feet in length, and its expanse of wing being probably about twenty-five feet. These Pteranodonts are found in the chalk of the United States; but species nearly as large occur in the chalk of this country, although they were furnished with a powerful armature of teeth, and have been described under the...

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...like that of the wing of a bat; and it is quite evident that there were no feathers either on the body or the w...

Format:PaperbackDimensions:64 pages, 9.69 × 7.44 × 0.13 inPublished:October 12, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217974988

ISBN - 13:9780217974981

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