LEPIDOSIREXIDiE. 
265 
generic characters with the so-called Ceratodus forsteri 1 of the 
Queensland rivers. The extinct species may constitute a distinct 
type— e. g., perhaps that already named Gosfordia (p. 275) ; and, in 
that case, the definition just stated will only apply to the recent fish, 
for which a new generic name will be required. 
Pig. 41. 
Ceratodus forsteri, Krefft.—Recent, Queensland Rivers. 
Ceratodus latissimus, Agassiz. 
1811. k ’ Trionyx f J. Parkinson, Organic Remains, vol. iii. p. 269, 
pi. xviii. fig. 1. 
1838. Ceratodus latissimus, L. Agassiz, Poiss. Foss. vol. iii. p. 131, 
pi. xx. figs. 8, 9. 
1838. 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. fio- 3 6, 7. 
[Ditto.] 
1838. Ceratodus emarginatus, L. Agassiz, ibid. p. 133, pi. xx. fDs. 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. 16. 
1838. Ceratodus altus , L. Agassiz, ibid. p. 134, pi. xviii. figs. 1, 2, pi. xx. 
. ' figs. 2-5. 
1844. Ceratodus trapezoides, T. Plieninger, in Meyer & Plieninger’s 
Pal. WiirttemBergVp. 87, pi. xii. fig. 50. [Stuttgart Museum.] 
18o0. Ceratodus anglicus , E. Beyrick, Zeitschr. deutsck. geol. Gesell. 
vol. ii. p. 159. 
1858. Ceratodus cloacinus, F. A. Quenstedt, Der Jura, p. 34, pi. ii. 
fig. 28. [Dental plate ; Tubingen University Museum.] 
1 G. Ivrefft, “ Description of a gigantic Amphibian allied to the genus Lepido- 
siren, from the Wide-Bay District, Queensland,” Proc. Zool. Soc. 1870, p. 221, 
woodc. 1-3. A. Gunther, “ Description of Ceratodus, a genus of Ganoid Fishes, 
recently discovered in Rivers of Queensland, Australia,” Phil. Trans. 1871, 
pp. 511-o71, pis. xxx.-xlii. See also T. H. Huxley, Proc. Zool. Soc. 1876, 
pp. 24-59, with hgs. 
