PISCES. 119 
MEGALODON, Agassiz. v. Portheus. 
lewesiensis, Mantell. v. Portheus mantelli. 
sauroides, Agassiz. v. Portheus mantelli. 
MEGALOPS, J}. L. G. de Lacépéde, Hist. Nat. Poissons, vol. v, 
1803, p. 289. 
priscus, L. Agassiz, Poiss. Foss., vol. v, pt. ii (1843), p. 114 (name 
only). 
Loc. London Clay ; Sheppey. [Skull; Brit. Mus.] 
MEGALURUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 145. 
austeni, P. M. G. Egerton, Figs. and Descript. Brit. Organic 
Remains, dec. ix (Mem. Geol. Sury., 1858), no. 9, pl. ix. 
Loc. Purbeck ; Swanage. [Imperfect fish; Brit. Mus.] 
damoni, P. M. G. Egerton, 7é7d., no. 8, pl. viii. 
Loc. Purbeck ; Bincombe, near Weymouth. [Fish ; Brit. Mus.} 
MERISTODON, Agassiz. v. Hybodus. 
paradoxa, Agassiz. v. Hybodus striatulus. 
MERLINUS, L. Agassiz, Rep. Brit. Assoc., 1844 (1845), p. 308 
(name only). 
cristatus, L. Agassiz, zézd, p. 308 (name only). T. 
Loc. London Clay; Sheppey. [Imperfect head; Brit. Mus.] 
MESACANTHUS, Traquair. v. Acanthodes. 
mitchelli (Egerton), Traquair. v. Acanthodes mitchelli. 
peachi (Egerton), Traquair. v. Acanthodes peachi. 
pusillus (Agassiz), Traquair. v. Acanthodes pusillus. 
MESODON, A. Wagner. Abh. k. bay. Akad. Wiss., Cl. ii (1851), 
p. 56. 
GYRONCHUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 
p. 202 (incompletely defined). 
? biserialis: Pycnodus biserial’s, L. Agassiz, tbéd., p. 199 (name 
only). 
Loc. Stonesfield Slate. [Mandib. dentition ; Brit. Mus.] 
bucklandi (Agassiz), A. S. Woodward, Geol. Mag. [3] vol. vi, 
1889, p. 454. 
Pycnodus bucklandt, L. Agassiz, Poiss. Foss., vol. ii, pt. 11 (1843), 
p- 192, pl. Ixxiia, f. 15-22; R. Owen, Odontogr. (1841), 
pl. xxxiv, f. 2; J. Morris, Cat. Brit. Foss., 1854, p. 342; J- 
Phillips, Geol. Oxford, 1871, p. 179, woodcut xaxix, f. 4, 5. 
[See also Wesodon sp. | 
Pycnodus didymus, L. Agassiz, Poiss. Foss., vol. ii, pt. 11 (1843), 
p. 193, pl. Ixxiia, f. 24, 25; R. Owen, Odontogr. (1841) 
pl. xxxiv, f. 3; J. Morris, Cat. Brit. Foss., 1854, p. 3423 J- 
Phillips, Geol. Oxford, 1871, p. 179, woodcut xxxix, f. 6. 
[Mandib. dentition ; Brit. Mus.] 
