File:The Quarterly journal of the Geological Society of London (12711516463).jpg

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52
PROCEEDINGS OF THE GEOLOGICAL SOCIETY.
Caprinella. — In Caprinella both valves are tubular; indeed the shell
is made up of tubes, the inner layer being evanescent, whilst the sur-
face is formed by an extremely thin compact lamina. That the tubes
Figs. 23, 24.-
-Sections q/Caprinula Boissii, jyOrb.
Chalk near Lisbon (Mr. D. Sharpe).
From Lower
Fig. 23.
Fig. 24.
Fig. 23. (A) Transverse section of straight valve.
Fig. 24. (B) Transverse section of spiral valve of a w^eathered specimen which has
lost the outer layer : /, I, position of ligamental inflection ; t, t, teeth ;
c, c, cartilage-pits ; u, u, urabonal cavity.
were open is proved by the limestone and small shells contained in
them ; and it is very improbable that even in the lifetime of the animal
they were permanently occupied by processes of the mantle. They are
rather to be compared to the tubular ribs of Cardiwn costatum,
which remain open, simply because the animal does not secrete suffi-
cient lime to render them solid.
Figs. 25, 26, 27. — Caprinella triangularis, Desm. f nat. size.
From the Upper Greensand of Rochelle.
Fig. 25.
Fig. 25. (A) Portion of the left valve, after D'Orbigny ; the shell- wall has been
removed by weathering, and the camerated interior exposed.
Fig. 26. (B) Mould of five of the water-chambers.
Fig. 27. (C) Mould of the body-chamber : u, right umbo ; s, left umbo ; t, dental

groove ; a, surface from which the posterior lobe has been detached.
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Source https://www.flickr.com/photos/biodivlibrary/12711516463
Author Geological Society of London
Full title
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The Quarterly journal of the Geological Society of London.
Page ID
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35614612
Item ID
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110213 (Find related Wikimedia Commons images)
Title ID
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51125
Page numbers
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Page 52
Names
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NameFound:Caprinella NameConfirmed:Caprinella NameBankID:4103206 NameFound:Caprinella triangularis NameFound:Cardiwn costatum
BHL Page URL
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https://www.biodiversitylibrary.org/page/35614612
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 11 (1855).
Flickr tags
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Flickr posted date
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23 February 2014
Credit
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This file comes from the Biodiversity Heritage Library.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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26 August 2015

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current20:27, 26 August 2015Thumbnail for version as of 20:27, 26 August 20151,828 × 3,200 (855 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/12711516463 | description = 52 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY. <br> Caprinella. — In C...

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