206 BRITISH FOSSIL VERTEBRATA. 
OPHIDERPETON, T. H. Huxley, Trans. Roy. Irish Acad., 
vol. xxiv (Sci.), 1867, p. 364. 
brownrig gi, [-ii] T. H. Huxley, zé7d., p. 364, pl. xxii, f. 1-4 ; [-il} 
L. C. Miall, Rep. Brit. Assoc., 1874 (1875), p. 171. 
Ophiderpeton nanum, A. Hancock and T. Atthey, Ann. Mag. 
Nat. Hist. [4] vol. i, 1868, p. 276, and Nat. Hist. Trans. 
Northumb. and Durham, vol. iii (1870), p. 79. [Skeleton ; 
Newcastle-upon-Tyne Mus. | 
Loc. Coal-Meas.; Jarrow, Kilkenny, Ireland, and Northumber- 
land. [Imperfect skeleton; Dublin Univ. Mus.] T. 
nanum, Hancock and Atthey. v. Ophiderpeton brownriggi. 
ORTHOSAURUS, T. P. Barkas. v. Loxomma. 
pachycephalus, T. P. Barkas. v. Loxomma allmanni. 
PARABATRACHUS, Owen. v. Megalichthys. [PISCES.] 
colei, Owen. v. Megalichthys hibberti. [PISCEs.] 
PHOLIDERPETON, T. H. Huxley, Quart. Journ. Geol. Soc., 
vol. xxv, 1869, p. 310. 
scutigerum, T. H. Huxley, zézd., p. 310, pl. xi; L. C. Miall, 
Rep. Brit. Assoc., 1874 (1875), p. 166. 
Pholiderpeton, J. Ward, [Proc.] N. Staffs. Nat. Field Club, 
1875, p. 249. 
‘New Carboniferous Labyrinthodont,’ L. C. Miall, Proc. Geol. 
Polyt. Soc. Yorkshire, vol. v (1870), p. 15. 
Loc. M. Coal-Meas.; Toftshaw, near Bradford. Coal-Meas.; 
Fenton, N. Staffordshire. [Portions of skeleton; Philo- 
sophical Society’s Mus., Bradford. ] T. 
PHOLIDOGASTER, T. H. Huxley, Quart. Journ. Geol. Soc., 
vol. xviii, 1862, p. 294. 
pisciformis, T. H. Huxley, zdzd., p. 294, pl. xi, f. 3, 4; L. C. Miall, 
Rep. Brit. Assoc., 1874 (1875), p. 166. 
Loc. L. Carb.; Edinburgh. [Imperfect skeleton ; Brit. Mus.] 
PTEROPLAX, A. Hancock and T. Atthey, Ann. Mag. Nat. Hist. 
[4] vol. i, 1868, p. 266, and Nat. Hist. Trans. Northumb. and 
Durham, vol. iii (1870), p. 67, and zdzd., vol. iv (1872), p. 206; 
L. C. Miall, Rep. Brit. Assoc., 1873 (1874), p. 226, and zéid., 
1874 (1875), p. 165. 
brevicornis, J. Young, Rep. Brit. Assoc., 1869 (1870), Sect. 
p. IOI, 
Loc. Coal-Meas.; Lanarkshire. [Skull with teeth; J. Thomson 
Coll.] : 
cornuta, A. Hancock and T. Atthey, Ann. Mag. Nat. Hist. [4] 
vol. i, 1868, p. 266, pl. xiv, pl. xv, f. 1, 2, and Nat. Hist. 
Trans. Northumb. and Durham, vol. iii (1870), p. 67, pl. i, 
pl. ii, f. 1, 2, and 2ézd@., vol. iv (1871), p. 207; T. Atthey, 
