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Title: Dansk ornithologisk forenings tidsskrift
Identifier: danskornithologi07dans (find matches)
Year: 1907 (1900s)
Authors: Dansk ornitologisk forening
Subjects: Birds -- Periodicals; Birds -- Denmark Periodicals
Publisher: (Kavn) : Den Forening
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing Before Image:
57 meget svag og lille, hos Claosanrus er den forsvunden. Ornitho- lestes har ogsaa mistet fjerde Finger, og dens Haand er derved kommen til at ligne Oldfuglens i en paafaldende Grad. Strudsen har ligeledes tre Fingre, men disse er ikke mere frie og bevæge- lige; de indesluttes i Vingehuden. Hos den flN'vende Fugl endelig er Fingerleddenes Antal stærkt mindsket og Fingrene samvok- sede. For Mellemhaandsknoglerne gælder et lignende Svind. Haandroden er end- nu mere forandret. "~'"™'""™""^^*^^^^'°"^~"~""' .^._=._^ Vi har i vor Haand 8 Haandrodsknogler, som er saaledes for- bundne, at vi for- maar at bevæge og dreje Haanden i alle Retninger. Men hvis Fuglen havde det samme,vildedenkun være daarlighjulpen: Luftens Tryk vilde dreje Vingespidsen rundt og gøre Flugt umulig. ToafPalæo- hatterias proksimale (kropnære) Haand- rodsknogler genfin- der vi baade hos Struds og Ravn, men af de distale (kropfjærne) har den unge Struds kun én tilbage, og hos Ravnen er den helt forsvunden, d. V. s. den er fast samvokset med det øverste af Mellemhaanden, saa at den ikke mere kan ses. Hvorledes Forholdet var hos Oldfuglen fremgaar ikke tydeligt af Forsteningen. Fuglefostret har Anlæg til (3 adskilte Haandrodsknogler. En anden Form af Særstræv kaldes progressiv, naar For- øgelsen af Enkeltheder i Organet overgaar Formindskelsen. Saa- ledes indeholder Hvaløglens Luffer baade et forøget Antal Fingre og Fingerled, og Udviklingen af Flyveøglens Haand til Flyvered- skab med sin uhyre Forlængelse af fjerde Finger maa vel ogsaa nærmest kaldes progressiv (se Fig. o), skønt den er regressiv m. H. t. Fingrenes Antal.
 Text Appearing After Image:
F'ig. 44. Sekretær. Serpentarius secretarius, (Brehm).

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https://www.flickr.com/photos/internetarchivebookimages/20827676382/

Author Internet Archive Book Images
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
1912
Flickr tags
InfoField
  • bookid:danskornithologi07dans
  • bookyear:1907
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:Dansk_ornitologisk_forening
  • booksubject:Birds_Periodicals
  • booksubject:Birds_Denmark_Periodicals
  • bookpublisher:_Kavn_Den_Forening
  • bookcontributor:American_Museum_of_Natural_History_Library
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:67
  • bookcollection:biodiversity
  • bookcollection:americanmuseumnaturalhistory
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
24 August 2015


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