Volume 1

The book of nature study / edited by J. Bretland Farmer ; assisted by a staff of specialists.

Date:
[1908?]-1909
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: The book of nature study / edited by J. Bretland Farmer ; assisted by a staff of specialists. Source: Wellcome Collection.

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    DISSECTED MODEL OF A PIGEON (BY EDWIN NOBLE). A:—The External Parts of a Pigeon.—i. Crown. 2. Forehead. 3. Ear: an area of bare skin found only in birds, such as Pigeons, Hawks and Eagles, and Parrots. 4. Beak. 5 Nape. 6. Throat. 7. Neck. 8. Base of Neck. 9. Scapulars. 10. Back. 11. Wing Coverts. 12. Greater, or Major Coverts. 13. Secondaries, or Wing-Quills of the Forearm. 14. Primaries, or Wing-Quills of the Hand. 15. Tail. B: — Diagram showing the Pterylosis, or Distribution of the Feathers.—1. Head Tract. 2. Ventral Neck Tract. 3. Dorsal NeckTract. 4. Spinal Tract. 5. Ventral Tract. 6. WingTract. 7. Femoral Tract. 8. Leg Tract. 9. Oil-Gland—very small in the Pigeon. Note the bare, featherless spaces. These are known as the ''Apteria, the feather tracts as the “ Pterylse. These tracts vary greatly in different species of birds, as may be seen by comparing, say, a sparrow, a fowl, and a pigeon. C -.—Diagram of the Skeleton of a Pigeon.—i. Orbit or Socket of the eye. 2. Brain Case. 3. Upper Jaw. 4. Lower Jaw. These two jaws form the “ Beak. 5. Neck Vertebrae. 6. Shoulder-blade, concealing the Back-bone. 7. Upper Arm Bone. 8. Forearm. 9. Hand. 10. Furcula or “ Merry- thought.” 11. Keel of Breast-bone or Sternum. 12. Hip Girdle. 13. Femur or Thigh bone. 14. Tibia or Shank Bone. 15. Tarso- Metatarsus or Foot Bones—all that is generally seen of the leg, except the toes, in the living bird. 16. Tees. 17. Tail Bones, the last of which is formed by a welding together of several bones to form a large flat plate known as the Pygostyle, and which sup- ports the tail feathers. D • Diagram of a Pigeon in which the Head and Back-bone is supposed to be seen in Sec- tion exposing the Brain and Spinal Cord (coloured green). The other Internal Organs ARE MUCH AS WOULD BE SEEN IF THE SIDE OF THE BODY WAS REMOVED. (Bones are Coloured yellow.)—i. Skull. 2. Brain. 3. Spinal Cord. 4. Back-bone, along which the Spinal Cord mns c Tongue 6 Windpipe. 7. Gullet, down which the food passes. A piece of the wall has been cut away from' the upper end to'show the interior of the tube. 8. The Crop. The outer wall of this has been cut away. During life the Crop is capable of being distended to an enormous extent. 8 Repre- .1 . 11 — C »1— th^ .‘stomach, which is continued backwards into the Gizzard, JllldUl, WU1U1 13 Loimwuou .. ' - the Gizzard is also indicated by doited lines, since it 10. Heart. 11. Keel of the Breast-bone. 12. Liver, n of Gizzard. 22102075473
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