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XXI.—On Thelodus Pagei, Powrie, sp. from the Old Red Sandstone of Forfarshire

Published online by Cambridge University Press:  06 July 2012

Ramsay H. Traquair
Ramsay H. Traquair
Affiliation:
Keeper of the Natural History Collections in the Museum of Science and Art, Edinburgh
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Extract

The remarkable fossil fish which forms the subject of the present communication belonged originally to the late Mr Powrie of Reswallie, and was acquired, along with the rest of his collection, by the Edinburgh Museum in 1892.

The specimen was obtained by Mr Powrie in a quarry of the Lower Old Red Sandstone at Turin Hill, near Forfar.

In his monograph on the Fossil Cephalaspidœ of Great Britain, published in 1870, (p. 41), Professor E. Ray Lankester refers in the following terms to the specimen in question:—

“A very remarkable specimen of shagreen-like structure has been discovered by Mr Powrie in Forfarshire, in beds which have furnished Cephalaspis. As I have not been able to assign it to Cephalaspidian fishes, though it may possibly, be connected with them, I only allude to it here. It consists of a surface covered with minute spinous tubercles, the whole having the appearance of a fossilised piece of shagreen, and its shape is more or less that of a Cephalaspid, with head and body.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 39 , Issue 3 , 1900 , pp. 595 - 602
Copyright
Copyright © Royal Society of Edinburgh 1900

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References

page 595 note * “On the Earliest Known Vestiges of Vertebrate Life; being a Description of the Fish Remains of the Old Red Sandstone of Forfarshire,” Trans. Geol. Soc. Edin., vol. i. pp. 284–301. Paper read 16th April 1869, published 1870.

page 596 note * “The Extinct Vertebrate Animals of the Moray Firth Area,” published in Harvie Brown and Buckley's” Vertebrate Fauna of the Moray Basin,” vol. ii., Edinburgh, 1890, p. 262.

page 597 note * Detached scales have also occurred in the Upper Devonian of Russia, and have been described and figured by Rohon Thelolepis ( = Thelodus) Tulensis.

page 597 note † In Murchison's Silurian System, vol. ii., 1839, p. 606, pl. iv., figs. 34–36.

page 597 note ‡ Qu. Journ. Geol. Soc., vol. ix. (1853), p. 14; British Palaeozoic Fossils, p. 576.

page 597 note § Pander, G. H., Monographie der Fossilen Fische des Silurischen Systems der Rassisch-baltischen Gouerments, St. Petersburg, 1856.Google Scholar

page 598 note * Handbuch der Palæontologie (Palæozoologie), vol. iii. p. 64.

page 598 note † Die Obersilurischen Fische von Oesel, ii. Theil; Mem. Acad. Imp. Sc. de St Petersburg, t. xli., No. 5, 1893.

page 598 note ‡ Grundzüge der Palæontologie, Munich and Leipzig, 1895, p. 530.

page 602 note * It may, however, here be noted that Dr O. M. Reis of Munich has already expressed the opinion regarding the Pteraspidæ, the only family hitherto by common consent included in the Heterostraci, that they, along with the Psammosteidæ, “eine einheitliche Degenerationsgruppe der Elasmobranchier bilden,” Geognostische Jahreshefte, vi. p. 6–1. See also the same author in Schwalbe's Morphologische Arbeiten, vi. p. 213.