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II.—The so-called Coprolites of Ichthyosaurians and Labyrinthodonts

Published online by Cambridge University Press:  01 May 2009

Arthur Smith Woodward LL.D., F.R.S.
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Extract

It appears to be still generally supposed that the Ichthyosaurians differed from all modern reptiles in having a short intestine with a spiral valve, like that of the more generalized fishes; and the supposition is rendered all the more plausible by the common belief that some at least of the Labyrinthodonts were similarly characterized. In each case, it is true, coprolites or masses of partially digested food, marked with the line of an intestinal spiral valve, are often found in the same strata as the skeletons; but, so far as I have been able to discover, no instance is known in which the spirally-marked coprolite actually occurs in its natural position in the fossilized animal.

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 12 , December 1917 , pp. 540 - 542
Copyright
Copyright © Cambridge University Press 1917

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References

1 Buckland, W., “On the Discovery of Coprolites, or Fossil Fæces, in the Lias at Lyme Regis and in other Formations”: Trans. Geol. Soc. [2], vol. iii, pp. 223–36, pls. xxviii–xxxi, 1829.CrossRefGoogle Scholar

1 Fraas, E., Die Ichthyosaurier der süddeutschen Trias- und Jura-Ablageungen, p. 34 (Tübingen, 1891).Google Scholar