File:The Quarterly journal of the Geological Society of London (13860036714).jpg

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LITTLE-KNOWN" JUEASSIC CELSTOLDS.
3£
radials have a corresponding curve, so that these joints are con-
siderably longer in the middle than at the sides, by the greater part
of which they are united to their fellows. The pentagonal axillaries
are short and wide, barely half as long again as the second radials,
Fig. 1. — Antedon latiradia, n. sp.
A. From beneath. B. From the side. (Twice the natural size.)
From the Great Oolite of Bradford.
their proportions being length

width =11

20. The first brachials
are united for about half the length of their inner sides, which are
shorter than the outer ones, owing to the inclination of the proximal
and distal edges to one another. This is more markedly the
case with the second brachials. The third brachial is a syzygial
or double joint, and the two following joints are transversely oblong.
On one of the three remaining arm-bases the fifth brachial is also a
syzygial joint.
The articular face of one first radial is visible. It is roughly
trapezoidal in shape, 4 mm. high, and a trifle wider across the
transverse ridge, which rises up around the opening of the axial
canal into a triangular articular surface. Beneath this is a small fossa
with a deep central pit for the insertion of the dorsal elastic liga-
ment. The greater part of the articular face is taken up by the
large plates for the attachment of muscles and ligaments, but the
boundaries of their respective fossae are not very distinct. There is
a shallow but wide notch between the two muscle-plates, though it
is not clear whether there was any vertical ridge descending from
it towards the opening of the axial canal. If there was one, it
became less marked as it approached the transverse ridge

for on
each side of the apex of the triangular articular surface is a deepish
pit which marks the central end of the ligament-fossa. These two
pits are connected by a shallow depression above the apex of the
tsiangle, so that the whole has somewhat of an hourglass-shape.
Size. Diameter of centrodorsal 7*5 mm.

diameter across the
circle of radial axillaries 14 mm.
Locality and horizon. The Great Oolite,

Bradford.
Date
Source https://www.flickr.com/photos/biodivlibrary/13860036714
Author Geological Society of London
Full title
InfoField
The Quarterly journal of the Geological Society of London.
Page ID
InfoField
36935764
Item ID
InfoField
113692 (Find related Wikimedia Commons images)
Title ID
InfoField
51125
Page numbers
InfoField
Page 39
Names
InfoField
NameFound:Antedon latiradia
BHL Page URL
InfoField
https://www.biodiversitylibrary.org/page/36935764
Page type
InfoField
Text
Flickr sets
InfoField
  • The Quarterly journal of the Geological Society of London. v. 38 (1882).
Flickr tags
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Flickr posted date
InfoField
15 April 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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This image was originally posted to Flickr by BioDivLibrary at https://flickr.com/photos/61021753@N02/13860036714. 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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current07:33, 26 August 2015Thumbnail for version as of 07:33, 26 August 20151,209 × 2,028 (539 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/13860036714 | description = LITTLE-KNOWN" JUEASSIC CELSTOLDS. <br> 3£ <br> radials have a co...

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