PISCES. 119 



MEGALODOX, Agassiz. v. Portheus. 



lewesiensis, Mantell. v. Portheus mantelli. 

 sauroides, Agassiz. v. Portheus mantelli. 



KEGALOPS. B. L. G. de Lacepede, Hist. Nat. Poissons, vol. v, 

 1803, p. 289. 



prisons, L. Agassiz, Poiss. Foss., vol. v, pt. ii (1843), P- JI 4 (name 

 only). 

 LOC. London Clay ; Sheppey. [Skull ; Brit. Mus.] 



MESALURUS, 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. Sun-., 1858), no. 9, pi. ix. 

 LOC. Purbeck ; Swanage. [Imperfect rish ; Brit. Mus.] 



damoni, P. M. G. Egerton, ibid., no. 8, pi. viii. 



LOC. Purbeck; Bincombe, near Weymouth. [Fish ; Brit. Mus.] 



MEXISTODOX, Agassiz. v. Hybodus. 



j>fWft(/ojca, Agassiz. v. Hybodus striatulus. 



MEIiLIXUS, L. Agassiz, Rep. Brit. Assoc, 1S44 (1845), P- 3°8 

 (name only). 

 cristatuSf L. Agassiz, ibid, p. 308 (name only). T. 



LOC. London Clay; Sheppey. [Imperfect head ; Brit. Mus.] 



MESACAXTHUS, Traquair. v. Acanthodcs. 



mitchelli (Egerton), Traquair. v. Acanthodes mitchelli. 

 peachi (Egerton), Traquair. v. Acanthodes peachi. 

 pusilltis (Agassiz), Traquair. v. Acanthodes pusillus. 



MEGODON. A. Wagner. Abh. k. bay. Akad. Wiss., CI. ii (1851), 

 p. 56. 

 GVRONCHUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 

 p. 202 (incompletely defined). 



? biser talis : Pycnodus biseria/is, L. Agassiz, ibid., 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 bucklandi, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 



p. 192, pi. lxxiia, f. 15-22; R.Owen, Odontogr. (1841), 



pi. xxxiv, f. 2 ; J. Morris, Cat. Brit. Foss., 1854, p. 342 ; J. 



Phillips, Geol. Oxford, 187 1, p. 179, woodcut x.xxix, f. 4, 5. 



[See also Mesodon spJ\ 

 Pycnodus didymus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 



p. 193, pi. lxxii a, f. 24, 25; R. Owen, Odontogr. ( 1 84 1 ) 



pi. xxxiv, f. 3 ; J. Morris, Cat. Brit. Foss., 1854, p. 342 ; J. 



Phillips, Geol. Oxford, 187 1, p. 179, woodcut xxxix, f. 6. 



[Mandib. dentition ; Brit. Mus.] 



