Transactions of the Zoological Society of London Volume 5

Transactions of the Zoological Society of London Volume 5

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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. 1866 edition. Excerpt: ...vertebra keeps distinct in Pterocles. The styliform ribs and the last, or sacral, have no appendage as in Sgrrhaptes; this last haemapophysis has a rudiment attached to it which really belongs to the arrested second sacral pleurapophysis. The same thing occurs in both genera. The strength of the vertebrae of Pterocles agrees pretty well with that of the Pigeons, especially the cervical; the caudal are, however, feebler. The pneumaticity of the skeleton of Pterocles agrees with what we find in Syrrhaptes. There is no appreciable difference in the wing-bones; but those of the leg are altogether stronger, and relatively of greater length as well. The great calcaneal sesamoid is also present. The middle metatarsal projects from between the other two, backwards, as in Syrrhaptes; but the rudimentary hallux-bones have not been preserved in the specimen under description. Professor Owen (Osteol. Catal. Mus. Coll. Surg. vol. i. pp. 273, 274, Nos. 1421 & 1422) speaks of " the long and slender tridactyle feet," and also that " there is no trace of a back toe." Now assuredly there is a rudiment of this toe in Pterocles arenarius, P. setarius, and P-. gutturalis, or else all the figures that I have at hand to refer to are wrong: it appears to be smallest in P. arenarius. The separation of the sacrum from the ossa innominata is kept up in Pterocles, as in Syrrhaptes; but the filling-in of the sacral roof is more perfect, so that there is only a double row of small foramina, instead of the large fenestrae that are seen in the pelvis of Syrrhaptes. For the rest, there is only additional strength to be remarked upon. The scapulae are much more like those of the Grouse, and the tip of the bone is not nearly so premorse. more

Product details

  • Paperback | 202 pages
  • 189 x 246 x 11mm | 372g
  • United States
  • English
  • black & white illustrations
  • 1236863275
  • 9781236863270