ic 4 BRITISH FOSSIL VERTEBRATA. 



HYBODUS {continued)— 

 ? sp., A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 277. 

 LOG. Chalk ; S. E. England. [Group of teeth ; Brit. Mus., 

 no. 453U-] 

 sp., J. Morris, Cat. Brit. Foss., 1S54, p. 330. (? Synechodus.) 



HYPSOCORMUS, A. Wagner, Abh. k. bay. Akad. Wiss., CI. ii, 

 vol. ix, 1863, p. 677. 



leedsi, A. S. Woodward, Geol. Mag. [3] vol. vi, 1889, p. 450, and 

 Rep. Brit. Assoc, 1889. 



LOC. Oxford Clay; Peterborough. [Jaws; A. N. Leeds Coll.] 

 tenuirostris, A. S. Woodward, ibid., p. 451, and ibid. 



LOC. Oxford Clay ; Peterborough. [Jaws ; A. N. Leeds Coll.] 



sp., A. S. Woodward, Geol. Mag. [3] vol. vi, 1889, p. 451. 



LOC. Kim. Clay ; Weymouth. [Portions of jaws ; Brit. Mus., 

 no. 42368.] 



HYPSODOX, Agassiz. v. Pachyrhizodus and Portheus. 



leivesletisiSf Agassiz. v. Cladocyclus lewesiensis, Pachyrhizodus 



gardneri, Portheus mantelli, and Portheus sp. 

 minor, Dixon, v. Ichthyodectes minor. 



oblonaus, L. Agassiz, Poiss. Foss., vol. v, pt. i (1843), p. 101 

 (name only). 

 LOC. London Clay ; Sheppey. 



toliapicus, L. Agassiz, Poiss. Foss., vol. v, pt. i (1843), p. 101 

 (name only.) 

 LOC. London Clay; Sheppey. [Imperfect cranium; Brit. Mus.] 



ICHTHYODECTES, E. D. Cope, Troc. Amer. Phil. Soc, vol. xi 

 (1 87 1), p. 536. 

 eleg-ans, E. T. Xcwton, Quart. Journ. Geol. Soc, vol. xxxiii, 

 1877, p. 521, pi. xxii, f. 15. 

 LOC. L. Chalk ; Dorking, Surrey. [Jaw; Brit. Mus.] 

 minor, E. T. Newton, ibid., p. 520, pi. xxii, f. 14. 



Hypsodon minor, F. Dixon, Geol. Sussex, 1850, descr. to pi. 



xxxii* f. 9 (name and fig. only). 

 LOC. Chalk ; Sussex. [Jaw ; Brit. Mus.] 



Ichthyolithus clack ma mien sis, Fleming. v. Megalichthys 

 hibberti. 



ICTIXOCEPHAIA7S, Page. v. Ischnacanthus. 

 granulattis. Page. v. Ischnacanthus gracilis. 



ISCHNACANTHUS, J. Powrie, Quart. Journ. Geol. Soc, vol. xx, 

 1S64, p. 419. 

 ICTIXOCEPHALUS, D. Page, Rep. Brit. Assoc, 1858 (1859), 

 Sect., p. 105. 



