File:The Quarterly journal of the Geological Society of London (13889308137).jpg

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ANNIVERSARY ADDRESS OF THE PRESIDENT. 55
being the homologue of the Dinosaurian prepubis, does not destroy
it ; since in these latter the pubic component of the tubercle may
grow and largely increase, the ischiatic element not augmenting,
until the latter is ultimately absolutely dominated by the former,
and that which in its origin was dual, finally appears to be, and is,
wholly composed of an outgrowth of the pubis alone, and the ilio-
pubic tubercle beconies a pubic tubercle. Now something of this
kind can be traced out in those singularly reptile-like Monotremes ,
the Echidna (fig. 6) and Oniithorhynchus (fig. 7). And I have
Fig. 6. — Pehls o/ Echidna, (ifter Wiedersheira.)
il. Ilium. is. Ischium. p. Pubis. m. Marsupial bone.
tip. Tuberculum ilio-pubicum.
thought that the horn-shaped process which juts out from the
front border of the os pubis in Chelonia .Testudo, fig. 8) may have
a similar origin, and that here, in a living reptile, we find the mor-
phological equivalent of the prepubis of the extinct Ornithopoda.
I have already, in treating of the presymphysial bone, incidentally
referred to one of the latest additions to our knowledge of cranial
structure in Dinosaurians, Prof. Cope's paper " On the Characters of
the Skull in Hadrosauridae." The description and figures of the
skull of Diclonius mirabilis show that it had a skull in form " a
good deal like that of a goose. Each maxillary bone contained
630 teeth, and each splenial 406 teeth, giving a grand total of 2072
teeth. Its dentition is so remarkable and so unique, and these
details of construction are so singular, that I hope no long time will
elapse before a fully descriptive and copiously illustrated memoir
upon it will appear.

In my address last year I alluded to the remarkable works
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Source https://www.flickr.com/photos/biodivlibrary/13889308137
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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36941812
Item ID
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113697 (Find related Wikimedia Commons images)
Title ID
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51125
Page numbers
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Page 55
Names
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NameFound:Chelonia NameConfirmed:Chelonia EOLID:19671 NameBankID:4935336 NameFound:Diclonius mirabilis NameConfirmed:Diclonius mirabilis NameFound:Echidna NameConfirmed:Echidna EOLID:24229 NameBankID:210872 NameFound:Hadrosauridae NameConfirmed:Hadrosauridae EOLID:4531646 NameBankID:5457308 NameFound:Ornithopoda NameConfirmed:Ornithopoda EOLID:4532043 NameFound:Testudo NameConfirmed:Testudo EOLID:35259 NameBankID:1541127 NameFound:Testudo NameConfirmed:Testudo EOLID:35259 NameBankID:2547062 NameFound:Tuberculum
BHL Page URL
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https://www.biodiversitylibrary.org/page/36941812
Page type
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 40 (1884).
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Flickr posted date
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30 April 2014
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This file comes from the Biodiversity Heritage Library.

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This image was originally posted to Flickr by BioDivLibrary at https://flickr.com/photos/61021753@N02/13889308137. It was reviewed on 26 August 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

26 August 2015

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