134 BRITISH FOSSIL VERTEBRATA. 
CRODVUS (continued )\— 
subteres (Agassiz), Davis. v. Orodus ramosus. 
?tenuis, J. W. Davis, 77d. (1883), p. 399, pl. li, f. 14; A. S. Wood- 
ward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 236. 
Loc. L. Carb. Limest.; Armagh. [Abraded tooth; Brit. Mus.] 
OROGNATHUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), pp. 
83, 105 (name only). 
conidens, L. Agassiz, 7b7d., p. 162 (name only). 
Loc. Coal-Meas. ; Carluke. T. 
ORTH ACANTHUS, Agassiz. v. Pleuracanthus. 
cylindricus, Agassiz. v. Pleuracanthus cylindricus, 
ORTIZACODUS, A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 
1889, p. 349. 
SPHENODUS, L. Agassiz (non Sphenodon, Gray, 1831, non Sphe- 
zodon, Lund, 1839), Poiss. Foss., vol. iii (1843), p. 288. 
sp.,.A. S. Woodward, Geol. Mag. [3] vol. vi, 1889, p. 362. 
Loc. Coral Rag; Malton, Yorkshire. [Teeth ; Malton Mus.] 
ORTHAGORISCUS, J. G. Schneider, Blochii Syst. Ichthy., 1801, 
p- 509 (Orthragoriscus). 
sp., F. Dixon, Geol: Sussex, 1850, descr. to pl. soon) ie as 
Morris, Cat. Brit. Foss., 1854, p. 335. Chelonian dentary 
bone, A. S. Woodward, Proc. Geol. Assoc., vol. x (1888), 
p- 276. 
Loc. Chalk ; Sussex. [Brit. Mus.] 
ORTHOGNATHUS. T.P. Barkas. v. Rhizodopsis. 
reticulosus, T. P. Barkas. vw. Rhizodopsis sauroides. 
OSMEROIDES, L. Agassiz, Poiss. Foss., vol. v, pt. i (1834), p. 14, 
and pt. ii (1843), p. 103. 
? crassus, F. Dixon, Geol. Sussex, 1850, p. 376; J. Morris, Cat. 
Brit. Foss., 1854, p. 335 ; A. S. Woodward, Proc. Geol. Assoc., 
vol. x (1888), p. 322. 
Loc. Chalk; Sussex. [Anterior portion of fish ; Brighton Mus.] 
granulatus, L. Agassiz, Poiss. Foss., vol. v, pt. i (1834), p. 14 
(name only) ; J. Morris, Cat. Brit. Foss., 1854, p. 335. 
Loc. Chalk; Lewes. [? Pomognathus eupterygius.| 
lewesiensis, L. Agassiz, Poiss. Foss., vol. v, pt. 1 (1834), p. 14, 
and pt. ii (1843), p. 105, pl. Ix J f. 1, 2, 5-7, pl. xe (won 
pl. Ix 4, f. 3,4: see Pomognathus eupterygius) ; J. Morris, 
Cat. Brit. Foss., 1854, p. 335 ; A. S. Woodward, Proc. Geol. - 
Assoc., vol. x (1888), p. 322. 
Salmo lewesiensis, G. A. Mantell, Foss. South Downs, 1822, 
p: 235, pl, xl, f..1, phi xxxni, f.12, 
