120 BRITISH FOSSIL VERTEBRATA. 
MESODON bucklandi (continued)— 
Pycnodus obtusus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 
p. 199; J. Morris, Cat. Brit. Foss., 1854, p. 342. [Vomer; 
Brit. Mus.] 
Pycnodus ovalis, L. Agassiz, 2b¢d., p. 195, pl. Ixxii a, f. 5; J. Morris, 
Cat. Brit. Foss., 1854, p. 342. [Vomer ; Bristol Mus. } 
? Gyrodus perlatus, L. Agassiz, 2b¢d., p. 236; J. Morris, Cat. 
Brit. Foss., 1854, p. 328. [Scales ; Brit. Mus.] 
Loc. Stonesfield Slate. [Vomer; Oxford Mus. ] 
discoides: Pycnodus discoides, L. Agassiz, Poiss. Foss., vol. ii, 
pt. 11 (1843), p. 199 (name only). 
Loc. Gt. Oolite; Little Gibraltar, Oxford. [Vomer; Brit. 
Mus. | 
liassicus (Egerton), J. J. Heckel, Denkschr. k. k. Akad. Wiss. 
Wien., math.-naturw. Cl., vol. xi, 1856, p. 202. 
Pycnodus liassicus, P. M. G. Egerton, Ann. Mag. Nat. Hist. [2] 
vol. xiil, 1854, p. 436, and Figs. and Descript. Brit. Organic 
Remains, dec. viii (Mem. Geol. Surv., 1855), no. 10, pl. x ; 
J. Morris, Cat. Brit. Foss., 1854, p. 342. 
Loc. L. Lias ; ? Barrow-on-Soar, and Tewkesbury. [Imperfect 
fish ; Brit. Mus. ] 
oblongus (Agassiz), K. A. von Zittel, Handb. Palont., vol. iii 
(1887), p. 247. 
Gyronchus Tee L. Agassiz, Poiss. Foss., vol. ii, pt. ii 
(1843), p. 202;0 pl. xix a; f.nojo11 3 J. Morris, Caleb 
Foss., 1854, p. 328. 
Loc. Stonesfield Slate. [Vomer; Bristol Mus.] 
rugulosus (Agassiz), A. S. Woodward, Geol. Mag. [3] vol. vi, 
1889, p. 454. 
Pycnodus pecdig L. Agassiz, Poiss. Foss., vol. ii, pt. il 
(1839-43), p. 194, pl. Ixxiia, f. 23; R. Owen, Odontogr. (1841), 
descr. to ‘pl. SOKLVG fs, Its oy. Morris, Cat. Brit. Foss., 1854, 
p- 342; ? J. Phillips, Geol. Oxford, 1871, p. 179, woodcut 
ROKK feel. 
Pycnodus parvus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843) 
p.i199% J. Morris, Cat. Brit. Foss., 1854, p. 342. [Mandib. 
dentition ; Brit. Mus.] 
Loc. Gt. Oolite; Northamptonshire. Stonesfield Slate. [Vomer ; 
Oxford Mus. ] 
trigonus (Agassiz), A. S. Woodward, Geol. Mag. [3] vol. iv, 
1889, p. 454. 
Gyrodus trigonus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 
p: 232, pl. Ixix a, f. 15; ‘J--Morris; Cats Brit. Foss., 18545 p, 3252 
J. Phillips, Geol. Oxford, 1871, p. 179, woodcut xxxix, f. 7. 
Pycnodus trigonus, WW. Buckland, Geol. and Mineral. ed. 2, 
1837, vol. 11, p. 45. pl. xxvii ¢, f. 3; L. Agassiz, Poiss. Hoss. 
vol. ii, pt. ii (1843), p. 199 (name only). [Vomer ; Oxford 
Mus. | 
