294 BRITISH FOSSIL VERTEBRATA. 
TRIONVX bowerbanki (continued)— 
1849), p. 61, pl. xix D, f. 7, and in F. Dixon, Geol. Sussex, 
1850, p. 221, pl. xii, f. 15, and zdzd., ed. 2, 1878, p. 266, same 
pl. and fig.; J. Morris, Cat. Brit. Foss., 1854, p. 354. 
[Right hypoplastron ; Brit. Mus.] 
Loc. Bracklesham Beds. [Nuchal scute ; Brit. Mus.] 
circumsulcatus, R. Owen, Rept. London Clay, pt. i (Pal. Soc., 
1849), p. 59, pl. xix B, f. 1, 2, 3; J. Morris, Cat. Brit. Foss., 
1854, p. 3543; G. Baur, Ann. Mag. Nat. Hist. [6] vol. iii, 
1889, p. 273. 
Aulacochelys circumsulcata, R. Lydekker, Ann. Mag. Nat. 
Hist. [6] vol. iii, 1889, p. 53, and Cat. Foss. Rept. B. M., 
pt. iii, 1889, p. 22. T. (Aulacochelys.) 
Loc. U. Eocene; Hordwell. [Costal scute; Brit. Mus.] 
henrici, R. Owen, Rept. London Clay, pt. i (Pal. Soc., 1849), 
p-. 46, pl. xvi; J. Morris, Cat. Brit. Foss., 1854, p. 354; 
R. Lydekker, Cat. Foss. Rept. B. M., pt. iii, 1889, p. 13. 
Trionyx marginatus, R. Owen, Rept. London Clay, pt. i (Pal. 
Soc., 1849), p. 55, pl. xix*; J. Morris, Cat. Brit. Foss., 1854, 
p- 354. [Carapace; Brit. Mus.] 
Trionyx, R. Owen, Rep. Brit. Assoc., 1847 (1848), Sect., p. 65. 
Loc. U. Eocene; Hordwell. [Carapace ; Brit. Mus. | 
incrassatus, R. Owen, Rept. London Clay, pt. 1 (Pal. Soc., 
1849), p. 51, pls. xvii, xviii, xix ; J. Morris, Cat. Brit. Foss., 
1854, p. 354; R. Lydekker, Cat. Foss. Rept. B. M., pt. iu, 
1889, p. 17. 
Loc. U. Eocene ; Hordwell (I. of Wight, Owen ervrore). [Por- 
tion of carapace ; Brit. Mus.] 
marginatus, Owen. v. Trionyx henrici. 
planus, R. Owen, Rept. London Clay, pt. i (Pal. Soc., 1849), 
p. 58, pl. xix C; J. Morn, Cat. Brit. Foss:, 1654, p: 354m 
R. Lydekker, Cat. Foss. Rept. B. M., pt. iii, 1889, p. 18. 
Loc. U. Eocene; Barton and Hordwell. [Posterior portion of 
carapace ; Brit. Mus.] 
pustulatus, R. Owen, Rept. London Clay, pt. i (Pal. Soc., 
1849), p. 60, pl. xix B, f. 7, 8,9; J. Morris, Cat. Brit. Foss., 
1854, p. 354. 
Loc. London Clay ; Sheppey. [Costal plate. ] 
rivosus, k. Owen, Rept. London Clay, pt. i (Pal. Soc., 1849), 
p. 56, pl. xviii A; J. Morris, Cat. Brit. Foss., 1854, p. 354; 
Rk. Lydekker, Cat. Foss. Rept. B. M., pt. ili, 1889, p. 19. 
[? Immature 7. planus. | 
Loc. U. Eocene; Hordwell. [Posterior portion of carapace ; 
Brit. Mus. ] 
SP, R. Owen, Rept. London Clay, pt. i (Pal. Soc., 1849), descr. to 
pl. xix D, f. 3-5; J. Morris, Cat. Brit. Foss., 1854, p. 354. 
Loc. U. Eocene; Hordwell. [Cervical vertebra and pubis. ] 
