162 BRITISH FOSSIL VERTEBRATA. 
PRISTODWS (continued)— 
concinnus rc R. H. Traquair, Geol. Mag. [3] vol. v, 1888, 
p. 102; A. S. Woodward, Cat. Foss. Fishes B. M.,, pti, 
1889, p. 64. 
Pristicladodus concinnus, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i (1883), p. 385, pl. xlix, f. 23, and Quart. Journ. Geol. 
Soc., vol xl, 1884, p. 621, pl. xxvi, f. 15. 
LOC. Peri Limest.; Yorkshire. [Imperfect tooth; York 
Mus. 
falcatus, J. Morris and G. E. Roberts (e+ Agassiz, MS.), Quart. 
Journ. Geol. Soc., vol. xviii, 1862, p. 101 (name only) ; J. W. 
Davis, Trans. Roy. Dublin Soc. [2] vol. i, 1883, p. 519, pl. 1xi, 
f. 17-22, and Quart. Journ. Geol. Soc., vol. xl, 1884, p. 623, 
pl. xxvi, f. 16, 20; RosH. Traquair; Geol. Mag. [3] vol. v, 
1888, p. tor; A. e Woodward, Cat. Foss. Fishes B. M., 
pt. 1, 1889, p. 63. 
Loc. U. Carb, Limest.; Yorkshire. [Teeth; Brit, Mus.) ae 
PROGNATHODUS, Egerton. v. Myriacanthus. 
guentheri, Egerton. v. Myriacanthus paradoxus. 
PROTOGALEUS, Molin. v. Galeocerdo. 
minor (Agassiz), Molin. v. Galeocerdo minor. 
PROTOSPHYRENA, J. Leidy, Trans. Amer. Phil. Soc., vol. xi, 
(1857), P- 95. 
SAUROCEPHALUS. L. Agassiz (zo Harlan), Poiss. Foss., vol. v, 
pt. i (1843), p. 102. 
ERISICHTHE, E. D. Cope, Vert. Cret. Form. West (Rep. U. S. 
Geol. Surv. Territ., vol. ii, 1875), p. 217; Bull. U. S. Geol. 
Surv. Territ., vol. ili, 1877, p. 821. 
ferox, J. Leidy, Trans. Amer. Phil. Soc., vol. xi (1857), p. 95; E. 
T. Newton, Quart. Journ. Geol. Soc., vol. xxxiv, 1878, p. 788 ; 
A. S. Woodward, Proc. Geol. Assoc., vol. x (1888), p. 321. 
‘Undetermined, G. A. Mantell, Foss. South Downs, 1822, 
p. 227, pl. xxxiil, f. 7-9. 
Saurocephalus lanciformis, L. Agassiz (zon Harlan), Poiss. 
Foss., Feuill., p. 55 (1835), and vol. v, pt. i (1843), p. 102, 
pl xxv ¢ f. 21-29; F. Dixon, Geol. Sussex, 1850, p. 374, 
Pixxx, fh t2L, pk ax f. 12; pl. xxxli*, f. 1, pleacexive foes 
J. Morris, Cat. Brit. Foss., 1854, p. 343. 
Saurocephalus laneeolatus, L. Agassiz, Poiss. Foss., vol. v, pt. i 
(1883), p. 8 (misprint). 
Xiphias dixoni, J. Leidy, Trans. Amer. Phil. Soc., vol. xi (1857), 
Pp. 95. [Rostrum ; Brit. Mus. } 
Erisichthe dixoni, E. D. Cope, Bull. U. S. Geol. Surv. Territ., 
vol. iii, 1877, p. 821; W. Davies, Geol. Mag. [2] vol. v, 1878, 
p:) 260, plain, £3. 
Loc. Chalk; S. E. England. [Teeth; Brit. Mus.] T. 
