142 BRITISH FOSSIL VERTEBRATA. 
PALZZOSPINAZX (continued)— 
sp., A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 325. 
Loc. Rhetic; Holwell, near Frome, Somersetshire. [Teeth 
and spines; Bath Mus.] 
PALMHOTHRISSUM, De Blainville. wv. Palzeoniscus. 
elegans, Sedgwick. v. Palzoniscus elegans. 
macrocephalum, Sedgwick. v. Palzoniscus comptus. 
magnum, Sedgwick. v. Palzoniscus comptus. 
PAMPHERACTUS, Agassiz. v. Bothriolepis. 
andersoni, Agassiz. v. Bothriolepis hydrophilus. 
hydrophilus, Agassiz. v. Bothriolepis hydrophilus. 
PAREXUS, L. Agassiz, Poiss. Foss. V. G. R. (1845), p. 120; J. 
Powrie, Quart. Journ. Geol. Soc., vol. xx, 1864, p. 423. 
falcatus, J. Powrie, Trans. Edinb. Geol. Soc., vol. i, 1870, p. 294, 
pl. xiil, f. 9. 
LOG aL. i Red Sandst.; Forfar. [Imperfect fish; J. Powrie 
Coll. 
inecurvus, L. Agassiz, Poiss. Foss. V. G. R. (1845), p. 120, 
pl. xxxiil, f. 26, 27; J. Morris, Cat. Brit. Foss., 1854, p. 337; 
J. Powrie, Quart. Journ. Geol. Soc., vol. xx, 1864, p. 424, 
pl. xx, f. 1, and Trans. Edinb. Geol. Soc., vol. i (1870), 
p. 293, pl. xii, f. 8. 
Loc. L. Old Red Sandst.; Forfarshire. [Dorsal fin-spine ; 
Rossie Priory.] T.. 
PASSALODON, Buckland. v. Edaphodon. 
PELARGORHYNCHUS, W. v. d. Marck. v. Dercetis. 
PELECOPTERUS, Cope. v. Protosphyrzna (fins of). 
PERCA, Linnzus, Syst. Nat., ed. 12, vol. i, 1766, p. 481. 
fuviatilis, Linnzus, 777, p. 481; E. T. Newton, Vert. Forest 
Bed (Mem. Geol. Surv., 1882), p. 120, pl. xviii, f. 1-8. 
Loc. Forest-Bed Series ; Norfolk. [Preoperculum, supra- 
clavicle, post-temporal, and scales; A. Savin Coll. and 
Mus. Pract. Geol.] 
PERCOSTOMA, L. Agassiz, Rep. Brit. Assoc., 1844 (1845), p. 307 
(name only). 
angustum, L. Agassiz, zdzd., p. 307 (name only). 
Loc. London Clay; Sheppey. [Imperfect head; Brit. Mus.] T. 
PERIODUS, Agassiz. v. Pycnodus. 
koenigi, Agassiz. v. Pycnodus toliapicus. 
marginalis, L. Agassiz, Poiss. Foss., vol. i (1844), p. xlii (name 
only). Probably teeth of AZesodon from the English Oolite. 
