Catalogue of the fossil fishes in the British Museum (Natural History) .. . Ceratodics forstcri, —Open mouth, showing dentition: u, narial openings ;x, vomerine teeth xx, palatine dental plates; xxx, mandibular dentalplates. forming a series of very large processes at the external margin, whichare sometimes feebly denticulated. Paired fins acutely lobate ; dor-sal fin arising about the middle of the back, both this and the analfin being continuous with the caudal. This definition is given on the assumption that the early Mesozoicteeth originally named by Agassiz pertain to a fish ident
Catalogue of the fossil fishes in the British Museum (Natural History) .. . Ceratodics forstcri, —Open mouth, showing dentition: u, narial openings ;x, vomerine teeth xx, palatine dental plates; xxx, mandibular dentalplates. forming a series of very large processes at the external margin, whichare sometimes feebly denticulated. Paired fins acutely lobate ; dor-sal fin arising about the middle of the back, both this and the analfin being continuous with the caudal. This definition is given on the assumption that the early Mesozoicteeth originally named by Agassiz pertain to a fish identical in 205 generic characters with the so-called Ceratodus forsteri1 of theQueensland rivers. The extinct species may constitute a distincttypo—, perhaps that already named Gosfordia (p. 275); and, inthat case, the definition just stated will only apply to the recent fish,for which a new generic name will be required. Fig. Ceratodus forster I, Krefflt.—Recent, Queensland Rivers. Ceratodus latissimus, Agassiz. 1811. Trionyx J. Parkinson, Organic Remains, vol. iii. p. 2G9, pi. xviii. fig. Ceratodus latissimus, L. Agassiz, Poiss. Foss. vol. iii. p. 131, pi. xx. figs. 8, Ceratodus curvus, L. Agassiz, ibid. p. 131, pi. xx. fig. 10. [Dental plate ; Bristol Museum.]1838. Ceratodus planus, L. Agassiz, ibid. p. 132, pi. xx. figs. 6, 7. [Ditto.]1838. Ceratodus emarginatus, L. Agassiz, ibid. p. 133, pi. xx. figs. 11- 13. [Ditto.]1838. Ceratodus gibbus, L. Agassiz, ibid. p. 133, pi. xx. figs. 14, 15. [Ditto.]1838. Ceratodus dcedaleus, L. Agassiz, ibid. p. 133, pi. xx. fig. Ceratodus alius, L. Agassiz, ibid. p. 134, pi. xviii. figs. 1, 2, pi. xx. figs. Ceratodus trapezoides, T. Plieninger, in Meyer & Plieningers Pal. Wiirttem bergs, p. 87, pi. xii. fig. 50. [Stuttgart Museum.]18o0. Ceratodus anglicus, E. Bey rich, Zeitschr. deutsch. geol. Gesell. vol. ii. p. Ceratod
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