AMPHIBIA. 205 
MASTODONSAURWS (continued)— 
pachygnathus (Owen), L. C. Miall, Quart. Journ. Geol. Soc., vol. 
xxx, 1874, p. 418, pl. xxvi, pl. xxvil, f. 1, 2 (?4), and Rep. 
Brit. Assoc., 1874 (1875), p. 152. 
Labyrinthodon pachygnathus, R. Owen, Trans. Geol. Soc. [2] 
vol. vi, 1841 (1842), p. 526, pl. xliii, f. 4-11, pl. xliv, f. 1-3 
(? pl. xlvi, f. 6, 7), and Odontography, p. 205 (1841), pl. 
Ixili A, f. 4, 5, pl. Ixiv B, f. 1, 2, and Palzont., ed. 2, 1861, 
p. 212; J. Morris, Cat. Brit. Foss., 1854, p. 350. 
Loc. Keuper; Coton End, Cubbington, and Warwick. [Portions 
of upper jaw ; Warwick Mus.] 
MEGALERPETON, J. Young, Rep. Brit. Assoc., 1869 (1870), 
Sect., p. For. 
plicidens, J. Young, 7é77., p. 101; L. C. Miall, Rep. Brit. Assoc., 
1874 (1875), p. 187. 
Loc. Coal-Meas.; Lanarkshire. [Skull with teeth; J. Thomson 
Coll.] mas 
simplex, J. Young, Rep. Brit. Assoc., 1869 (1870), Sect., p. 101 ; 
L. C. Miall, Rep. Brit. Assoc., 1874 (1875), p. 188. 
LOC. alae Lanarkshire. [Skull with teeth; J. Thomson 
Coll. 
MEGALOCEPHALUS, T. P. Barkas. v. Loxomma. 
macromma, T. P. Barkas. v. Loxomma allmanni. 
MESOSAURUS, T. P. Barkas, Coal Meas. Palzont., 1873, p. 116 
(name only). 
taylori, T. P. Barkas, 7é/d. (name only) ; L, C. Miall, Rep. Brit. 
Assoc., 1874 (1875), p. 188 (no information). 
Loc. Coal-Meas. ; Northumberland. 
METOPIAS, H. von Meyer (on Eichwald, 1842), Neues Jahrb., 
1842, p. 302; L. C. Miall, Rep. Brit. Assoc., 1874 (1875), p. 
157, pl. ¥, 1. 2. 
? diagnosticus, H. von Meyer, Neues Jahrb., 1842, p. 302, and 
Saurier des Muschelkalkes, 1847-52, pp. 146, 167,pls. Ix, Ixi, 
f, 3, Ixiv, f. 10; L. C. Miall, Rep. Brit. Assoc., 1874 (1875), 
p. 157. 
| Loc. Rhetic; Aust Cliff, near Bristol. [/vagments of skull and 
jaws, Bristol Mus.) T. 
_- MOLGE, B. Merrem, Tent. Syst. Amphib., 1820, p. 185. 
TRITON, J. N. Laurenti, Syn. Rept., 1768, p. 147 (preoccupied). 
cristata (Laurenti), G. A. Boulenger, Cat. Batrachia Caudata, 
B. M., ed. 2, 1882, p. 8. 
Triton cristatus, J. N. Laurenti, Syn. Rept., 1768, p. 147; 
E. T. Newton, Geol. Mag. [2] vol. ix, 1882, p. 9, and Vert. 
Forest Bed (Mem. Geol. Surv., 1882), p. 119, pl. xvii, f. 9. 
Loc. Forest Bed; West Runton. [Femur ; Mus. Pract. Geol.) 
