File:The biology of dragonflies (Odonata or Paraneuroptera) (1917) (19759652424).jpg

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Title: The biology of dragonflies (Odonata or Paraneuroptera)
Identifier: biologyofdragonf00till (find matches)
Year: 1917 (1910s)
Authors: Tillyard, Robin John, 1881-1937
Subjects: Dragon-flies
Publisher: Cambridge (Eng. ) : University Press
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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V) THE AlilMENTARY AND EXCRETORY SYSTEMS 105 the soft inner cuticle in fig. 47 b) takes its place, becoming quickly hardened (I45j. The itmscular tunic of the gizzard is excessively strong, owing to the enormous development of the circular muscle-fibres (cm). The longitudinal fibres remain weak, forming only eight or sixteen separate strands (hx) placed externally to the circular tunic. The latter consists of several layers, greatly increased and strengthened below the dental folds, where the fibres run directly inwards towards the cuticle. By insinuating themselves between the columnar cells, om
Text Appearing After Image:
Fig. 47. T.s. through larval gizzard, a. Synlestes weyersi Selys ( x 80). b. Cordu- lephya ftyginaeaSelys ( x4-H). cm circular muscle; a< cuticle; cm'soft cuticle; ep raised epithelium; fi fibrillae; Im longitudinal muscle; om oblique muscle; I, t' teeth. Original. these fibres become attached directly to the soft inner portion of the cuticle. Such an arrangement is very exceptional, and points to the powerful nature of the operations of this organ. For purposes of comparison, a transverse section through the less highly specialized gizzard of Synlestes is shewn in fig. 47 a. The Dentition of the Larval Gizzard (fig. 48). In the oldest type of gizzard, the dental folds are narrow and elongated, bearing numerous small teeth, all of ecjual size, and pointing backwards towards the posterior end. The folds are

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https://www.flickr.com/photos/internetarchivebookimages/19759652424/

Author Internet Archive Book Images
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  • bookid:biologyofdragonf00till
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Tillyard_Robin_John_1881_1937
  • booksubject:Dragon_flies
  • bookpublisher:Cambridge_Eng_University_Press
  • bookcontributor:University_of_California_Libraries
  • booksponsor:Internet_Archive
  • bookleafnumber:127
  • bookcollection:cdl
  • bookcollection:americana
  • BHL Collection
Flickr posted date
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7 August 2015

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current19:44, 19 September 2015Thumbnail for version as of 19:44, 19 September 20151,546 × 1,040 (338 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Title''': The biology of dragonflies (Odonata or Paraneuroptera)<br> '''Identifier''': biologyofdragonf00till ([https://commons.wikimedia.org/w/index.php?title=Special%3ASea...

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