164 BRITISH FOSSIL VERTEBRATA, 
PSAMMODUS rugosus (continued)— 
J. Morris and G. E. Roberts, Quart. Journ. Geol. Soc., vol- 
xviii, 1862, p. 1o2; R. Etheridge, jun., Geol. Mag. [2] vol. 
iv, 1877, p. 308, pl. xiii, f. 7-9; J. W. Davis, Trans. Roy. 
Dublin Soc. [2] vol. i (1883), p. 459, pls. lvi, lvii, and Quart. 
Journ. Geol. Soc., vol. xl, 1884, p. 629, and Geol. Mag. [3] 
vol. ili, 1886, p. 156; A. S. Woodward, Cat. Foss. Fishes 
B. M., pt. i, 1889, p. 100. 
Psammodus porosus, L. Agassiz, Poiss. Foss., vol. iii (1838), 
p. 112, pl. xiii, f. 1-18; J. E. Portlock, Rep. Geol. London- 
derry, 1843, p. 465, pl. xiva, f. 2; J. Morris, Cat. Brit. Foss., 
1854, p. 341; W. H. Baily, Figs. Char. Brit. Foss., 1875, 
p- 120, pl. xli, f. 9. [Abraded teeth ; Bristol Mus.] 
Psammtdus rugosus, var. porosus, F. M‘Coy, Brit. Palzoz. 
Foss. (1855), p. 644. 
Psammodus canaliculatus, F. M‘Coy, Ann. Mag. Nat. Hist. [2] 
vol. ii, 1848, p. 122, and Brit. Palzeoz. Foss. (1855), p. 643, 
pl. 1G, f. 12; J. Morris, Cat. Brit. Foss., 1854, p. 34¢. 
{Tooth ; Woodwardian Mus. ] 
Loc. L. Carb. Limest.; Gloucestershire, Armagh, Sligo, and 
Wexford. U.Carb. Limest.; Richmond, Yorkshire. Carb. 
Limest. ; Ayrshire, Westmoreland, Derbyshire, and North 
Wales. [Teeth ; Bristol Mus. and Brit. Mus.] T. 
? salopiensis, A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 
1889, pp. 105, 187. 
‘A palate, or part of a palate, J. Morris and G. E. Roberts, 
Quart. Journ. Geol. Soc., vol. xviii, 1862, p. 105, pl. iii, f. 5. 
Loc. Carb. Limest. ; Farlow, Shropshire. [Teeth ; Brit. Mus.]} 
subteres, Agassiz. wv. Orodus ramosus. 
trapeziformis (Davis), A. S. Woodward, Cat. Foss. Fishes 
B. M., pt. i, 1889, p. 105. 
Flomalodus trapeziformis, J. W. Davis, Trans. Roy. Dublin 
Soc. [2] vol. i (1883), p. 482, pl. viii, f 30. T. (Homalodus.) 
Flomalodus guadratus, J. W. Davis, zbéd., p. 482, pl. lvili, f. 31. 
[Tooth ; Brit. Mus.] 
Loc. L. Carb. Limest.; Armagh. [Tooth ; Brit. Mus.] 
turgidus, Agassiz. v. Helodus turgidus. 
PSAMMOSTEUS, L. Agassiz, Poiss. Foss. V. G. R. (1845), 
Pp: 103: 
granulatus, F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, 
p- 7; J: Morris, Cat. Brit. Foss., 1854, p. 341. 
Loc. L. Carb.; Kesh, Co. Fermanagh. [Dermal plate ; 0/7 
k. Griffith Coll.] 
vermicularis, fF. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, 
p. 7; J. Morris, Cat. Brit. Foss., 1854, p. 341. 
Loc. Carb.; Fallaghloon, Maghera. [Dermal plate; od/m 
R. Griffith Coll.] 
