Odontography, Or, a Treatise on the Comparative Anatomy of the Teeth, Their Physiological Relations, Mode of Developement, and Microscipic Structure, in the Vertebrate Animals; Text Volume 1

Odontography, Or, a Treatise on the Comparative Anatomy of the Teeth, Their Physiological Relations, Mode of Developement, and Microscipic Structure, in the Vertebrate Animals; Text Volume 1

By (author) 

List price: US$36.98

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1845 edition. Excerpt: ...(P1. 63 A, fig. 6) the teeth are relatively fewer, more unequal, but for the most part much larger than in the previous species, and the jaws are correspondingly shorter and stronger. The teeth are long, slender, very acute, sub-compressed and slightly curved; they have been described as arranged or approximated in pairs, but this is the case with a few only, and the hinder tooth is always the smallest; whence I conclude that it was a successional tooth, which has been developed in the same relative position to its predecessor as in the great Varanus, (compare figs. 6 & 9, Pl. 63 A). The intermaxillary bone, in the specimen figured, contains four teeth on one side, of which the first three are of small size; there are seven teeth in the maxillary bone of the same side, of which the hinder ones, that extend beneath the orbit, are the shortest; the corresponding ramus of the lower jaw contains six teeth; the supposed successional teeth are included in the preceding enumeration. In the Pterodactylus medias the base of the teeth have been stated to be hollow, as in the teeth of the crocodile, and to contain the germs of their successors;(2) the right half of the lower jaw contains sixteen teeth, of nearly equal size, the binder ones becoming smaller. They are simple, conical, slightly recurved, compressed and smooth. In the Pterodactylus Munste1i the teeth are slender, recurved, (1) " On en voit de tout semblables dans le sauvegarde, et surtout dans la dragons (T/iorictea dracmnn)." Ihave not observed in any existing reptile this mode of emergence of the successional teeth, as in Mammalia, by an outlet distinct from the socket of the previous tooth. In the great safe-guard (Varamw), the successional teeth rise from the...show more

Product details

  • Paperback | 250 pages
  • 189 x 246 x 13mm | 454g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236940253
  • 9781236940254