American Anatomical Memoirs Volume 9

American Anatomical Memoirs Volume 9

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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. 1919 edition. Excerpt: ... is no parietal eye. An end-vesicle develops, but there is no parietal foramen. 3. Lyriocephalus sculatus. Spencer ('86).387 There is no parietal eye in this species. An end-vesicle exists with an attenuated stalk. There is no pigment, but the animal has a definite parietal spot. 4. Calotes ophiomachus and versicolor. Spencer ('86).3f'7 The epiphysis ends at the edge of the parietal foramen. The parietal eye is present. Spencer saw only rods in the retina. The lens is concavo-convex. Some of the lens cells and retinal cells are pigmented. A well-marked parietal foramen is present and there is a small modified cornea with parietal spots. 5. Agama hispida. Spencer ('86).3,17 This species has a parietal eye, a retina, lens, and a parietal foramen, together with a cornea and parietal spot. 6. Grammatophora barbata. Spencer ('86).367 In this form there was found some evidence of a parietal eye, the under wall of which was definitely pigmented. McKay ('88)266 found a bi-convexed lens, a good retina with rod cells and round cells, a molecular layer, and also a spindle-celled layer and peculiar, triangular elements. The lumen was traversed by a fine strand. 7. Moloch horridus. Spencer ('86).367 In this species the organ is strongly pigmented, more likely an end-vesicle with a stalk than a parietal eye. The parietal foramen in which the organ rests is present. Both cornea and parietal spot are present. 8. Agama caucasica. Owsiannikow ('88).295 In this species there is a relatively large parietal eye with rods in the retina, which latter is otherwise well developed, There is also a lens, a parietal foramen, a vitreous, cornea, and a parietal spot. In one case, Ritter ('94)333 found an accessory organ which he called the parapineal organ. It was...show more

Product details

  • Paperback | 74 pages
  • 189 x 246 x 4mm | 150g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236776895
  • 9781236776891