ISBN: 1331948843

Paperback, [EAN: 9781331948841], Forgotten Books, Forgotten Books, Book, [PU: Forgotten Books], Forgotten Books, Excerpt from Proceedings of the Academy of Natural Sciences of Philadelphi… Altro …

Paperback, [EAN: 9781331948841], Forgotten Books, Forgotten Books, Book, [PU: Forgotten Books], Forgotten Books, Excerpt from Proceedings of the Academy of Natural Sciences of Philadelphia: 1889Of all the investing bones of the outer surface of the cranium in our specimen none possess a greater interest than the squamosal. One of these (sq) stands between the frontal and parietal of the same Side above, and the primary structures of the ear and associate parts below. Essentially, at this stage the squamosal is a flat. Bone Of a pear-shaped outline, the smaller part being directed backwards, and the larger oval moiety forwards, which latter bears near its anterior periphery the forward-projecting zygomatic process. It articulates with the posterior extremity of the jugal Of the corresponding side. Even in the adult Neotoma, the glenoid facette of the squamosal is not nearly as definitely marked as we find it in many other forms of eutherian mammals, so in this embryo the feature is still less pro nounced at the stage of development in the specimen before us. In figure 1 of my plates I have intentionally slightly dislodged the mandible from its normal position the better to Show the embryonic otic structures, which latter have to a less degree been Similarly dealt with.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical w, 13542, Paleontology, 16310871, Paleobiology, 16310901, Paleozoology, 16310911, Vertebrate, 13469, Biological Sciences, 75, Science & Math, 1000, Subjects, 283155, Books, 13563, Zoology, 16310991, Amphibians, 16311011, Animal Behavior & Communication, 16311021, Animal Psychology, 3049091, Ichthyology, 3049111, Invertebrates, 3049131, Mammals, 3049151, Ornithology, 3049171, Primatology, 16311061, Reptiles, 13469, Biological Sciences, 75, Science & Math, 1000, Subjects, 283155, Books<

ISBN: 9781331948841

Paperback, [PU: Forgotten Books], Excerpt from Proceedings of the Academy of Natural Sciences of Philadelphia: 1889 Rodents are notorious for the large size of the premaxillary bones in t… Altro …

Paperback, [PU: Forgotten Books], Excerpt from Proceedings of the Academy of Natural Sciences of Philadelphia: 1889 Rodents are notorious for the large size of the premaxillary bones in their skulls, and to this rule the genus now under consideration forms no exception. Here a premaxillary of either side stands between the corresponding nasal and maxillary, preventing those elements of the face from coming in contact at any point. Supe riorly, it sends backwards a lanceolate-shaped apophysis to overlap the frontal of the same Side, and this feature is distinctly shown in Plate I, Figs. 1 and 2. Laterally, it makes up the chief side-wall of the conical fore-part of the Skull of this embryo, and rounds under to form the roof of the anterior part of the mouth, though here a mesially oval foramen largely prevents it from suturally uniting with the fellow of the opposite side down the middle line (plate 1, Fig. Each one anteriorly and beneath shows a diminutive pitlet, in which the inci sor tooth is budding out, the latter not quite filling the hole closely, and withal being yet in an elementary state. Either premaxillary in the oval foramen above referred to, and on the outer aspect of the nasal septum in front, send backwards a teat-like process, into the Spinal Space; and in the skull of the adult Neotoma, these processes seem to have finally each pressed down upon the vomer and fused with its infero-anterior part. A premaxillary articulates with a nasal, a frontal, a lacrymal, the vomer, the ethmoidal mass, and with the fellow of the Opposite side, and at this stage it seems to have progressed in its ossification, about as far as the nasals have, already described above. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works., Zoology & Animal Sciences, Palaeontology<

2016, ISBN: 9781331948841

Trade paperback, We ship with delivery confirmation worldwide. We answer all e-mails within one business day., New., Trade paperback (US). Glued binding. Contains: Unspecified, Illustrati… Altro …

Trade paperback, We ship with delivery confirmation worldwide. We answer all e-mails within one business day., New., Trade paperback (US). Glued binding. Contains: Unspecified, Illustrations, black & white., [PU: Forgotten Books]<

2015, ISBN: 1331948843

[EAN: 9781331948841], Neubuch, [PU: Forgotten Books], This item is printed on demand for shipment within 3 working days.