194 BRITISH FOSSIL VERTEBRATA. 
THYELLINA, Agassiz. v. Scyllium. 
prisca, Agassiz. v. Palzospinax priscus. 
TINCA, Cuvier, Régne Animal, vol. ii, 1817, p. 193. 
vulgaris, Cuvier, 7éz7., p. 193; E. T. Newton, Vert. Forest Bed 
(Mem. Geol. Surv., 1882), p. 127, pl. xviii, f. 21-23. 
Loc. Forest-Bed Series (U. Freshwater Bed); West Runton, 
Norfolk. [Pharyngeal and tooth ; A. Savin Coll., and Mus. 
Pract. Geol.| 
TOMODUS, J. W. Davis (ex Agassiz, MS.), Trans. Roy. Dublin 
Soc. [2] vol. i (1883), p. 446. 
convexus, J. Morris and G. E. Roberts (ex Agassiz, MS.), Quart. 
Journ. Geol. Soc., vol. xviii, 1862, p. 1o1 (name only) ; J. W. 
Davis, Trans. Roy. Dublin Soc. [2] vol.i (1883), p. 446, pl. ly, 
f. 15-18; O. St. John and A. H. Worthen, Pal. Illinois, 
vol. vii, 1883, p. 172; A. S. Woodward, Cat. Foss. Fishes 
B. M., pt. i, 1889, p. 191. 
Cochliodus contortus, L. Agassiz (errore), Poiss. Foss., vol. iii 
(1838), p. 115, pl. xiv, f. 23-25. 
Loc. L. Carb. Limest.; Bristol. [Teeth ; Bristol Mus.] T. 
TOMOGNATHUS, F. Dixon, Geol. Sussex, 1850, p. 376. 
leiodus, Dixon. v. Tomognathus mordax. 
mordax, F. Dixon, Geol. Sussex, 1850, p. 376, pl. xxxv, f. 1; 
J. Morris, Cat. Brit. Foss., 1854, p. 346; A. S. Woodward, 
Proc. Geol. Assoc., vol. x (1888), p. 313. 
Tomognathus letodus, ¥. Dixon, Geol. Sussex, 1850, p. 377, 
l. xxx, f. 31; J. Morris, Cat. Brit. Foss., 1854) °"p: 34a 
Mandib. rami; Brit. Mus.] 
Loc. Chalk; Sussex. [Jaws.] T. 
TRIPLOPTERUS, M‘Coy. v. Osteolepis. 
pollexfeni, M‘Coy. wv. Osteolepis macrolepidotus. 
TRIPTERUS, M‘Coy. v. Osteolepis. 
pollexfeni, M‘Coy. wv. Osteolepis macrolepidotus. 
TRISTICHOPTERWUS, P. M. G. Egerton, Rep. Brit. Assoc., 
1860 (1861), Sect., p. 78, and Figs. and Descript. Brit. 
Organic Remains, dec. x (Mem. Geol. Surv., 1861), p. 51. 
alatus, P.M. G. Egerton, Rep. Brit. Assoc., 1860 (1861), Sect., 
p. 78, and Figs. and Descript. Brit. Organic Remains, 
dec. x (Mem. Geol. Surv., 1861), p. 51, pls. iv, v; R. H. Tra- 
quair, Proc. Roy. Soc. Edinb., vol. viii, 1875, p. 513, and 
Trans. Roy. Soc. Edinb., vol. xxvii (1876), p. 383, pl. xxxii. 
Loc. L. Old Red Sandst.; Caithness. [Trunk; Mus. Pract. 
Geol. and Brit. Mus.] T. 
