REPTILIA. 295 
TRIONWX (continued)— 
sp., R. Lydekker, Cat. Foss. Rept. B. M., pt. iii, 1889, p. IT. 
Loc. L. Miocene; Hempstead. ([Costal plate; Brit. Mus., 
no. 36812 a.| 
sp., R. Lydekker, zéz@., p. 21. 
Loc. London Clay; Sheppey. ([Costal plate; Brit. Mus., 
no. 33303-] 
sp., W. H. Bensted, Geologist, vol. v, 1862, p. 296, woodcut 2. 
[Referred to by R. Lydekker, Cat. Foss. Rept. B. M., pt. iii, 
1889, p. 38, as either Chelone or, Lytoloma]. 
Loc. Chalk ; Rochester. [Femur ; Brit. Mus., no. 36254.] 
sp., R. Owen, Rep. Brit. Assoc., 1841 (1842), p. 168; P. Duff, Geol. 
Moray, 1842, p. 65, pl. v, f. 10. [Chelonian femur from the 
Rheetic of Linksfield, near Elgin, genus non det.; Brit. Mus.] 
TROPIDEMYS, L. Riitimeyer, Neue Denkschr. schweiz. Ges. 
Nat., vol. xxv (1873), p. 27. 
? langi, L. Riitimeyer, zézd., pp. 28-43, pl. vii, f. 1, 3, 4, pl. x, f. 5, 6; 
R. Lydekker, Cat. Foss. Rept. B. M., pt. ili, 1889, p. 156, 
woodcut 38. 
Loc. Kim. Clay ; Weymouth. [/vagments of shell; Brit. Mus.| 
TROPIDONOTWS, H. Kohl, Ferussac’s Bull. Sci., vol. ii, 1824, 
p- 81; F. Boie, Isis (Oken), 1827, p. 518. 
natrix (Linnzus), Boie, 77d; E. T. Newton, Geol. Mag. [2] vol. ix, 
1882, p. 8, and Vert. Forest Bed (Mem. Geol. Surv., 1882), 
p.-114, pl. xvii, f. 4, 5. 
Coluber natrix, Linnzus, Syst. Nat., ed. 12, vol. i, 1766, p. 380 
Loc. Forest Bed; West Runton and Bacton. [Vertebre ; 
E. T. Dowson Coll. and Owens College, Manchester.| 
VARANUS, B. Merrem, Tent. Syst. Amphib., 1820, p. 58. 
margariticeps, Gervais. v. Placosaurus margariticeps. 
VECTISAURUWS, J. W. Hulke, Quart. Journ. Geol. Soc., vol. xxxv, 
1879, p. 421. 
valdensis, J. W. Hulke, zézd., p. 421, pl. xxi. 
Loc. Wealden; I. of Wight. [Vertebrze and ilium; J. W. 
Hulke Coll.] T. 
VIPERA, J. N. Laurenti, Syn. Rept., 1768, p. 99. 
berus (Linnzus), F. M. Daudin, Hist. Nat. Rept., vol. vi, an xi 
(1803), p. 89, pl. Ixxii. 
Pelias berus, B. Merrem, Versuch Syst. Amphib. (Tent. Syst. 
Amphib.), 1820, p. 148; E. T. Newton, Geol. Mag. [2] vol. ix, 
1882, p. 8, and Vert. Forest Bed (Mem. Geol. Surv., 1882), 
pnts; pl xvii, £ 6. 
Coluber berus, Linnzeus, Syst. Nat., ed. 12, vol. i, 1766, p. 377. 
Loc. Forest Bed; West Runton. [Vertebra,; Mus. Pract. Geol.| 
