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I.—On a Specimen of Psephodus magnus, Agassiz, from the Carboniferous Limestone of East Kilbride, Lanarkshire1

Published online by Cambridge University Press:  01 May 2009

R. H. Traquair
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Extract

In his “Tableau générale des Poissons Fossiles,” published in 1844, and appended to the first volume of his great work, Agassiz enumerates five species of his Carboniferous selachian genus Cochliodus, of which he only described one, the well-known C. contortus; the others, of which the names only were then published, being C. magnus, C. acutus, C. oblongus, and C. strtatus.

Type
Original Articles
Information
Geological Magazine , Volume 2 , Issue 8 , August 1885 , pp. 337 - 344
Copyright
Copyright © Cambridge University Press 1885

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References

page 337 note 2 “British Palæozoic Fossils,” London and Cambridge, 1855.Google Scholar

page 338 note 1 Geological Survey, Illinois, vol.ii. p. 92.Google Scholar

page 339 note 1 “On the Fossil Fishes of the Carboniferous Limestone Series,” Sc. Trans. Koy. Dub. Soc. vol.i. ser. 2, 1883. (Read May 15, 1882.)Google Scholar

page 340 note 1 p. 64.

page 340 note 2 Trans. Geol. Soc. Glasgow, vol. vii. pt. i. pp. 164–166.Google Scholar

page 341 note 1 Bull. Soc. Imp. Nat. Moscow, vol. xxxvii. 1864. pp. 157–170.Google Scholar

page 343 note 1 In placing the long or obtusely angulated margin of the supposed “posterior” tooth (b of our specimen) outwards, Mr. Davis apparently follows M‘Coy’s description. But in describing the supposed “middle” tooth (a) M‘Coy calls its long margin “inner,” and though Mr. Davis quotes this description verbatim, he, nevertheless, with some inconsistency places the long margin in exactly the reverse position, namely, external.

page 344 note 1 Note addedJuly 20th. A recent examination of the specimens of Helodus simplexin the British Museum has convinced me that these teeth are truly “Lophodont” in form, and consequently the genus Lophodus must be altogether abolished.

page 344 note 2 Geol. Mag. vol. iv. 1867. pp. 59–63.Google Scholar

page 344 note 3 Geol. Survey of Illinois, vol. ii. Palæontology, p. 74.Google Scholar

page 344 note 4 Geol. Survey of Illinois, vol. vii. Palæontology.Google Scholar

page 344 note 5 [This Plate is by permission of the Council of the Geol. Soc. of Glasgow allowed to appear in the Geological Magazine.]