_ 
PISCES. 165 
PSEPHODUS, J. Morris and G. E. Roberts (ex Agassiz, MS.), 
Quart. Journ. Geol. Soc., vol. xviii, 1862, p. tor; R. H. Tra- 
quair, Trans. Geol. Soc. Glasgow, vol. vii (1884), p. 396, pl. xvi 
(reprinted, Geol. Mag. [3] vol. ii, 1885, p. 337, pl. viii). 
HELODUS, L. Agassiz, Poiss. Foss., vol. iii (1838), p. 104 (pars). 
LopHopus, H. Romanovsky, Bull. Soc. Imp. Nat. Moscou, 
vol. xxxvii, 1864, pt. ii, p- 160 (Pars). 
ASPIDODUS, J. S. Newberry and A. H. Worthen, Pal. Illinois, 
vol. ii, 1866, p. 92. 
TNIODUS, O. St. John and A. H. Worthen, Pal. Illinois, vol. Vil, 
1883, p. 75 (pars). 
dubius, A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, 
p. 183, pl. vi, f. 13 (? f. 12). 
Loc. Carb. Limest. ; Oreton, Shropshire. [Tooth ; Brit. Mus. | 
leevissimus (Agassiz), A. S. Woodward, zéz@., 1889, p. 181, pl. vi, 
f. 16. 
Flelodus levissimus, L. Agassiz, Poiss. Foss., vol. iii (1838), 
p. 104, pl. xiv, f. 1-14 (zon f. 15) (lettered Psammodus on plate). 
Loc. L. Carb. (Bone-bed in L. Limest. Shales); Avon Gorge, 
near Bristol. [Teeth ; Bristol Mus.] 
magnus (M‘Coy), J. Morris and G. E., Roberts, Quart. Journ. Geol. 
Soc., vol. xviii, 1862, p. 101 ; J. W. Davis, Trans. Roy. Dublin 
Soc. [2] vol. i (1883), p. 439, pl. lv, f. 1-14, and Geol. Mag. 
[3] vol. iii, 1886, p. 151; R. H. Traquair, Trans. Geol. Soc. 
Glasgow, vol. vii (1884), p. 392, pl. xvi (reprinted, Geol. Mag. 
[3] vol. ii, 1885, p. 337, pl. viii); A.S. Woodward, Cat. Foss. 
Fishes B. M., pt. i, 1889, p. 177. 
Cochliodus magnus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 174 
(name only); J. E. Portlock, Rep. Geol. Londonderry, 1843, 
p. 466, pl. xiva, f. 4 (fig. only) ; J. Morris, Cat. Brit. Foss., 
1854, p. 322 ; F. M‘Coy, Brit. Palaoz. Foss. (1855), p. 622. 
Flelodus planus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 173 
(name only); J. Morris, Cat. Brit. Foss.,. 1854; p: 328); F: 
M ‘Coy, Brit. Palzeoz. Foss. (1855), p. 631, pl. iiiy, f. 12-15. 
Helodus planus = Cochliodus magnus, J. E. Portlock, Rep. 
Geol. Londonderry, 1843, p. 462. 
ftelodus didymus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 173 
(name only) ; J. Morris, Cat. Brit. Foss., 1854, p. 328; F. 
M‘Coy, Brit. Palzoz. Foss. (1855), p. 630, pl. iii1, f. 18-20 
(pars). 
flelodus levissimus, F. M ‘Coy, Brit. Palzoz. Foss. (1855), p. 
630 (pars). 
flelodus rudis, F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, 
p. 123, and Brit. Palazoz. Foss. (1855), p. 631, plemk, £ 4; 
J- Morris, Cat. Brit. Foss., 1854, p. 328; J. W. Davis, Trans. 
Roy. Dublin Soc. [2] vol. i (1883), p. A57, ph liz, £11. 
Lophodus levissimus, J. W. Davis, zéd. (1883), p. 404, pl. li, 
f. 18 (pars). 
