PISCES. 63 
DERCETIS (continued)— 
elongatus, L. Agassiz, Poiss. Foss., Feuill., p. 55 (1835) (pars, 
name only), and vol. ii, pt. ii (1843), p. 258, pl. Ixvi a, f. 1, 
2, 5-8 (non f. 3, 4); F. Dixon, Geol. Sussex, 1850, pl. xxxiv, 
f. 5; J. Morris, Cat. Brit. Foss., 1854, p. 325; W. Davies, 
Geol. Mag. [2] vol. vi, 1879, p. 145; A. S. Woodward, Proc. 
Geol. Assoc., vol. x (1888), p. 318. [See also Murena 
lewestensis. | 
Loc. Chalk; S. E. England. [Imperfect fishes; Brit. Mus.] T. 
DICENTRODUS, R. H. Traquair, Geol. Mag. [3] vol. v, 1888, 
p. 86. 
bicuspidatus, R. H. Traquair, Geol. Mag. [3] vol. v, 1888, 
p. 86; A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 
1889, p. 26, pl. vi, f. 7-9. | 
Cladodus bicuspidatus, R. H. Traquair, Geol. Mag. [2] vol. viii, | 
1881, p. 35. 
Loc. M. Carb. Limest. (Blackband Ironstone); Borough Lee, 
near Edinburgh. [Teeth ; Edinburgh Mus.] T. 
DICLITODUWS, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i, 
(1883), p. 410. 
scitulus, J. W. Davis, zdid., p. 410, pl. li, f. 29, and Quart. Journ, 
Geol. Soc., vol. xl, 1884, p. 623, pl. xxvil, f. 12. 
Loc. Yoredale Rocks ; Wensleydale, Yorkshire. [Tooth; York 
Mus. | T. 
DICRENODUS, H. Romanovsky, Bull. Soc. Imp. Nat. Moscou, 
1853, pt. 1, p. 408. 
CARCHAROPSIS, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 313 
(undefined) ; J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i (1883), p. 381. 
PRISTICLADODUS, F. M‘Coy, Brit. Palzoz. Foss. (1855), 
p. 642. 
dentatus (M‘Coy), A. S. Woodward, Cat. Foss. Fishes B. M., 
pt. 1, 1889, p. 28. 
Carcharopsis prototypus, L. Agassiz, Poiss. Foss., vol. iii 
(1843), p. 313 (name only). [Tooth; Brit. Mus.] 
T. (Carcharopsis.) 
Pristicladodus dentatus, F. M‘Coy, Brit. Palzeoz. Foss. (1855), 
642, pl. iii G, f.2; J. W. Davis, Trans. Roy. Dublin Soc. 
f3] vol. i (1883), p- 384, pl. xlix, f. 22, and Quart. Journ, Geol. 
Soc., vol. xl, 1884, p. 620, pl. xxvii, f. 4; R. H. Traquair, 
Geol. Mag. [3] vol. v, 1888, p. 103. T. (Pristicladodus.) 
Carcharopsis colet, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i (1883), p. 383, pl. xlix, f. 26. [Tooth; Brit. Mus.] 
Loc. L. Carb. Limest.; Armagh and Ayrshire. U. Carb. Limest.; 
Yorkshire and Derbyshire. [Tooth ; Woodwardian Mus.] 
