PETALODONUD^. 
55 
that of Ctenoptyehius apiealis, the latter more approaching Petalodus. 
Since, however, it seems advisable to retain CUnoptychius, Agassiz, 
as a genus distinct from Petalodus, G.pectinatus must henceforth be 
quoted under the recently proposed generic name of Callopristodus. 
Callopristodns pectinatua (Agassiz). 
1838. Ctenoptyehius pectinatus, L. Agassiz, Poiss. Foss. vol. iii. p. 100, 
pi. 19. figs. 2—4. 
1838. Ctenoptyehius denticulatus, L. Agassiz, tom. cit. p. 101, pi. 19. 
figs. 5-7. 
1841. Ctenoptyehius pectinatus, E. W. Binney, Trans. Manchester Geol. 
Soc. voL i. p. 109, pL v. figs. 20, 21. 
1867. Ageleodus diadeina, R. Owen, Trans. Odontol. Soc. vol. v. p. 340, 
pi. iv. 
1870. Cteiwptychius pectinatus, A. Hancock & T. Atthey, Nat. Hist. 
Trans. Northurab. & Durham, vol. iii. p. 115. 
1873. Ctemptychius pectinatus, T. P. Barkas, Coal Meas. Palseont. p. 18, 
pi. i. tigs. 17-19. 
1874. Ctenoptyehius pectitiatus, W. J. Barkas, Monthly Rev. Dental 
Surgery, vol. ii. p. 440, figs, xiii., xviii., xix. 
1874. Ctenoptyehius denticulatus, W. J. Barkas, tom. cit. p. 441. 
1882. Ctenoptyehius pectinatus, T. Stock, Ann. & Mag. Nat. Hist. [5] 
voL ix. p. 266, pi. ■viii. figs. 5-17. 
1888. Callopristodus pectinatus, R. H. Traquair, Geol. Mag. [3] vol. v. 
p. 85. 
Type. Detached teeth ; coU. Royal Society of Edinburgh. 
Margin of dental crown not acuminate ; denticulations sharply 
pointed. 
Form. ^ Loe. Lower Carboniferous : Scotch Coalfield. Coal- 
Measures : Northumberland, Yorkshire, Lancashire, Staffordshire. 
The occurrence of this species in the Rhaetic Bone-bed of Aust, 
recorded by J. W. Davis, Quart. Joum. Geol. Soc. vol. xxxvii. p. 424, 
must be regarded as extremely doubtful. 
50096. Two teeth ; Calciferous Sandstone, Burdiehouse, Edinburgh. 
Purchased, 1879. 
P. 4494. Eleven teeth ; Blackband Ironstone, Edge Coal Series, 
Borough Leo, Edinburgh. 
Presented by Ramsay H. Traquair, Esq., M.D., 1884. 
41197, 45901. Seven teeth; probably from Borough Lee. 
Purchased, 1868, 1874. 
41196, 41734. Six teeth; Coal-Measures, Neweastle-on-Tyne. 
Purchased. 1868, 1869. 
