PISCES. 151 



JPLATYACANTHUS, F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. ii, 

 1848, p. 120, and Proc. Camb. Phil. Soc, vol. i (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. 



PLATYGXATHUS, Agassiz. v. Glyptolepis, Glyptopomus, and 

 Holoptychius. 

 jamesoni, Agassiz. v. Holoptychius flemingi. 

 minor, Agassiz. v. Glyptopomus minor. 

 paiicidens, Agassiz. v. Glyptolepis paucidens. 



PLATYLSMUS, F. Dixon, Geol. Sussex, 1850, p. 205. 



PSEUDOSPH/ERODON, F. Noetling, Abh. Geol. Specialk. Preussen 

 u. Thiiring. Staaten, vol. vi, pt. iii, 1885, p. 102. 



cclei, F. Dixon, Geol. Sussex, 1850, p. 205, pi. xii, f. 11-13, pi. x, 

 f. 23 ; J. Morris, Cat. Brit. Foss., 1854, p. 339. 

 LOC. Bracklesham Beds. [Pharyngeals ; Brit. Mus.] T» 



PLATYSIAGUM, P. M. G. Egerton, Figs, and Descript. Brit. 

 Organic Remains, dec. xiii (Mem. Geol. Surv., 1872), no. 6. 



grandis : Heterolcftidotus grandis, J. W. Davis, Journ. Linn. Soc, 

 Zoology, vol. xviii, 1885, p. 293, pi. vii. 

 LOC. L. Lias ; Lyme Regis. [Fish ; J. W. Davis Coll.] 



sclerocephalum, P. M. G. Egerton, ibid., no. 6, pi. vi, and 



Quart. Journ. Geol. Soc, vol. xxix, 1873, P- 4 J 9- 



? Eugnathus polyodon, L. Agassiz, Poiss. Foss., vol. ii, pt. ii 



( I 835), P- 104, pi. lviii a, f. 2; J. Morris, Cat. Brit. Foss., 



1854, p. 326. [Jaw; Oxford Mus.] 



LOC. L. Lias ; Lyme Regis. [Fish ; Brit. Mus.] T. 



FXiATYSOXKUS, 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. 

 xxix (1879), P- 368. 

 (leclivis, Agassiz. v. Eurynotus crenatus. 



forsteri, A. Hancock and T. Atthey, Ann. Mag. Nat. Hist. [4] 

 vol. ix, 1872, p. 254, pi. xvii, f. 3, and Nat. Hist. Trans. 

 Northumb. and Durham, vol. iv (1872), p. 413, pi. xv, f. 3 ; 

 R. H. Traquair, Trans. Roy. Soc. Edinb., vol. xxix (1879), 

 p. 369, pi. vi, f. 10. 

 LOC. Coal-Meas. ; Newsham, Northumberland. [Imperfect fish ; 

 Newcastle-upon-Tyne Mus.] 



