Items related to The microscope and its revelations Volume 2
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 Excerpt: ... those of a harrow (Fig. 400). 578. Many other varieties might be described, did space permit; but we must be content with adding, that the form and arrangement of the teeth of these 'palates' afford characters of great value in classification, as was first pointed out by Prof. Loven (of Stockholm) in 1847, and has been since very strongly urged by Dr. J. E. Gray, who considers that the structure of these organs is one of the best guides to the natural affinities of the species, genera, and families of this group, since any important alteration in the form or position of the teeth must be accompanied by some corresponding peculiarity in the habits and food of the animal.1 Hence a systematic examination and delineation of the structure and arrangement of these organs, by the aid of the Microscope and Camera Lucida, would be of the greatest service to this department of Natural History. The short thick tube of Limax and other terrestrial Gasteropods, appears adapted for the trituration of the food previously to its passing into the oesophagus; for in these animals we find the roof of the mouth furnished with a large strong horny plate, against which the flat end of the tongue can work. On the other hand, the flattened portion of the palate of Buccinum (whelk) and its allies is used by these animals as a file, with which they bore holes through the shells of the 1" Annals of Natural History," Ser. 2, VoL x. (1852), p. 418. Mollnsks that serve as their prey; this they are enabled to effect by everting that part of the probosis-shaped mouth whose floor is formed by the flattened part of the tube, which is thus brought to tho exterior, and by giving a kind of sawing-motion to the organ by means of the alternate action of two pairs of muscles,--a protrac...
"synopsis" may belong to another edition of this title.
Search results for The microscope and its revelations Volume 2
Stock Image
The Microscope and Its Revelations (Volume 1)
Seller: Leserstrahl (Preise inkl. MwSt.), Oldenbüttel, Germany
Seller rating 5 out of 5 stars
Taschenbuch. Condition: Fine. leichte Lagerspuren / minimal shelfwear---. nein. Seller Inventory # 91536