CHIMiERrDJS. 
73 
Genus BDAPHODOHT, Buckland. 
[Proc. Geol. Soc. yol. ii. 1838, p. 687 \] 
Syn. Passalodon, W. Buckland, ibid. 
Psittcicodon, L. Agassiz, Poiss. Foss. yol. iii. 1843, p. 340 (in 
part). 
Eumylodus, J. Leidy, Extinct Vert. Fauna W. Territ. (Bep. U. S. 
Geol. Sury. Territ. yol. i. 1873), p. 309. 
Dipristis, 0. C. Marsk, Proc. Anier. Assoc. Ady. Sci. 1869, p. 230, 
Mandibular tooth massiye, with no definite thickening upon the 
outer aspect, and the symphysial facette very broad; one anterior 
tritor present, and sometimes a smaller one below it; one median 
tritor, occasionally divided longitudinally, and two external tritors. 
Palatine teeth very robust, with no well-defined thickening upon 
the outer aspect; three tritors present, two being inner and one 
outer. Vomerine tooth more or less triangular in side view, with 
tritors upon the oral margin; post-oral region laterally expanded, 
without any thickening. 
The name of Pcissalodon was applied by Buckland to the vomerine 
teeth, and that of Psittcicodon by Agassiz to the mandibular teeth 
of E. mcintelli and E. sedgwicki. 
Bdapkodosi sedgwicki (Agassiz). 
1843. Clnmcera ( Psittacodon ) sedgwickii , L. Agassiz, Poiss. Foss. vol. 
iii. p. 349, pi. xl. figs. 17, 18. 
1843. IscJtyoclus sedgwicki , Sir P. Egerton, Proc. Geol. Soc. vol. iv. 
p. 156. 
1847. Edciphodon sedgwicki , Sir P. Egerton, Quart. Journ. Geol. Soc. 
vol. iii. p. 352. 
1850. Edaphodon sedgwicki , F. Dixon, Foss. Sussex, p. 203. 
1864. EdapJiodus huxleyi , H. G. Seeley, Ann. Mag. Nat. Hist. [3] 
vol. xiv. p. 276 (name only). [Fragmentary teeth ; Woodwardian 
Museum, Cambridge.] 
1878. Edaphodon sedgwickii , E. T. Newton, Chimaeroid Fishes Brit. 
Cret. Rocks (Mem. Geol. Surv., Monogr. iv.), p. 7, pis. i., ii. 
Type. Imperfect right mandibular tooth ; Mus. Geological Society 
of London. 
A species attaining to a very large size, the measurement from 
the middle of the symphysial border to the extremity of the post¬ 
oral margin of the mandibular tooth being sometimes 0*15. Man¬ 
dibular tooth with a very prominent beak, and the symphysial 
1 This genus was first satisfactorily defined by Egerton, Quart. Journ. Greol. 
Soc. vol. iii. (1847), p. 351, pi. xiii. figs. 2, 3. 
