a 
PISCES. I51 
PLATYACANTHUS, F.M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 
1848, p. 120, and Proc. Camb. Phil. Soc., vol. 1 (1848), p. 65 
(Platycanthus). 
isosceles, F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 1848, p. 120 ; 
J. Morris, Cat. Brit. Foss., 1854, p. 339. ? Oracanthus (J. 
W. Davis, Trans. Roy. Dublin Soc. [2] vol. i (1883), p. 525). 
Loc. L. Carb. Limest.; Armagh. [Dermal plate ; Geol. Soc. 
London. ] 
PLATYCANTHUS, M‘Coy. v. Platyacanthus. 
PLATYGNATHUS, Agassiz. v. Glyptolepis, Glyptopomus, and 
Holoptychius. 
jamesoni, Agassiz. v. Holoptychius flemingi. 
minor, Agassiz. v. Glyptopomus minor. 
paucidens, Agassiz. v. Glyptolepis paucidens. 
PLATYLEMUS, F. Dixon, Geol. Sussex, 1850, p. 205. 
PSEUDOSPHRODON, F. Noetling, Abh. Geol. Specialk. Preussen 
u. Thiring. Staaten, vol. vi, pt. ili, 1885, p. 102. 
colei, F. Dixon, Geol. Sussex, 1850, p. 205, pl. xii, f. 11-13, pl. x, 
f. 23; J. Morris, Cat. Brit. Foss., 1854, p. 339. 
Loc. Bracklesham Beds. [Pharyngeals ; Brit. Mus.] se 
PLATYSIAGUM, P. M.G. Egerton, Figs. and Descript. Brit. 
Organic Remains, dec. xiii (Mem. Geol. Surv., 1872), no. 6. 
grandis: Heterolcpidotus grandis, J. W. Davis, Journ. Linn. Soc., 
Zoology, vol. xviii, 1885, p. 293, pl. vii. 
Loc. L. Lias; Lyme Regis. [Fish; J. W. Davis Coll.] 
sclerocephalum, P. M. G. Everton, zézd@., no. 6, pl. vi, and 
Quart. Journ. Geol. Soc., vol. xxix, 1873, p. 419. 
? Eugnathus polyodon, L. Agassiz, Poiss. Foss., vol. ii, pt. il 
(1835), p. 104, pl. lviii a, f. 2; J. Morris, Cat. Brit. Foss., 
1854, p. 326. [Jaw; Oxford Mus.] 
Loc. L. Lias; Lyme Regis. [Fish; Brit. Mus.] T. 
PLATYSOMUS, L. Agassiz, Poiss. Foss., vol. ii, pt. i (1835), 
pp. 6, 161; J. Young, Quart. Journ. Geol. Soc., vol. xxii, 
1866, p. 302 ; R. H. Traquair, Trans. Roy. Soc. Edinb., vol. 
xx1x (1879), p. 368. 
declivis, Agassiz. v. Eurynotus crenatus. 
forsteri, A. Hancock and T. Atthey, Ann. Mag. Nat. Hist. [4] 
vol. ix, 1872, p. 254, pl. xvii, f. 3, and Nat. Hist. Trans. 
Northumb. and Durham, vol. iv (1872), p. 413, pl. xv, f. 3; 
R. H. Traquair, Trans. Roy. Soc. Edinb., vol. xxix (1879), 
p- 369, pl. vi, f. ro. 
Loc. Coal-Meas. ; Newsham, Northumberland. [Imperfect fish ; 
Newcastle-upon-Tyne Mus. ] 
