The Ornithosauria: An Elementary Study Of The Bones Of Pterodactyles, Made From Fossil Remains Found In The Cambridge Upper Greensand, And Arranged In The Woodwardian Museum Of The University Of Cambridge
The Ornithosauria: An Elementary Study Of The Bones Of Pterodactyles, Made From Fossil Remains Found In The Cambridge Upper Greensand, And Arranged In The Woodwardian Museum Of The University Of Cambridge
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 Excerpt: ...characteristics of Pterodactyle bones which it shows, demonstrate that it is not from a bird, but from an Ornithosaurian skeleton. The bones are of paper thinness, and consist (c)f a strong bone behind which distally appears on the inner side to be compressed and thrown backward and flattened at the side, exactly like ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 Excerpt: ...characteristics of Pterodactyle bones which it shows, demonstrate that it is not from a bird, but from an Ornithosaurian skeleton. The bones are of paper thinness, and consist (c)f a strong bone behind which distally appears on the inner side to be compressed and thrown backward and flattened at the side, exactly like the inner toe in Natatorial birds. On the front of this strong support, confluent with it, and confluent together, so that the places of union are only seen at the distal end and in transverse section, are three bones, together as wide as the bone on which they rest. It does not appear possible that the distal articulations could have supported more than three digits. This bone, if correctly determined, offers points of affinity with birds as pronounced and as important as any thing shown by the extremities, for among reptiles a welding of the (tarsal or) tarso-metatarsal bones is unknown, and here it is as absolute as in any bird, and takes a characteristic bird shape. In the Rodent Jerboa the metatarsus has much the same form as in a bird. No phalanges have been recognised. The Vertebral Column. Caae. Comp. Tablet. Specimen. J c i 1-15 ATLAS AND AXIS. PI. 9. Fifteen specimens are mounted to exemplify the structures of the Pterodactyle atlas and axis. Nos. 1, 11, and 2 have already been figured, and described by Prof. Owen, the latter as a section of a cervical vertebra. The atlas centrum, a saucer-shaped disk of bone, commonly united more or less intimately with the centrum of the axis, but sometimes free. It presents in front a hemispherical cup for the basi-occipital, and is flattened or slightly convex behind. Its neural arch is seen in Nos. 2, 10, and 12; but the only specimen with the arch entire is in the museum of James Carter, Esq.
Read Less
All Editions of The Ornithosauria: An Elementary Study Of The Bones Of Pterodactyles, Made From Fossil Remains Found In The Cambridge Upper Greensand, And Arranged In The Woodwardian Museum Of The University Of Cambridge
