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I.—On the Destinction between Castor and Trogontherium

Published online by Cambridge University Press:  01 May 2009

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A Comparison, with corresponding parts of existing species of Castor, of specimens of mandible and mandibular teeth of a large beaver-like quadruped, obtained from the fresh-water deposits called the ‘Forest-bed’ on the Borfolk coast, led me, in 1845, to the conclusion signified by the adoption of Fischer's generic appellation, Trogontherium, for the rodent, which seemed to exemplify “ an extinct aub-generic type” of Castoridæ.

Type
Original Articles
Information
Geological Magazine , Volume 6 , Issue 56 , February 1869 , pp. 49 - 56
Copyright
Copyright © Cambridge University Press 1869

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References

Page 49 note 1 “British Fossil Mammals,” 8vo. p.184

Page 50 note 1 There seems to be more loss than gain in reyersing the usual way, viz., from before backward, of counting teeth; and so I retain my method of considering the hindmost of the pre-molars, like the hindmost of the true molars, as the last of its series, which in Diphyodonts is the fourth. The order in which both kinds of teeth follow one after another, viz., from before backward (if there be an interval in appearance), also weighs with me in rejecting Rutimeyer's innovation of counting the hindmost and last appearing milk-molar and pre-molar, as the “first“ of their respective series. — “ Beitrage zur Kenntniss der fossilen Pferde,” in “ Verhandlungen der Natur-forsch. Gesellsch. in Basel,” Bd. iii. Ht. 4, 1863.Google Scholar

Page 51 note 1 Brit. Foss. Mamm. P. 186, fig.72.

Page 55 note 1 Catal. of Osteol. in Surgeon's College, 4to, No. 2193, p. 392.

Page 55 note 2 Elephas, Rhinoceros, Cerrus, Equus, Hyaena, Ursus.