264 BRITISH FOSSIL VERTEBRATA. 
PETROSUCHUS, R. Owen, Rept. Weald. and Purb. Form., 
Suppl. viii (Pal. Soc., 1878), p. ro. 
leevidens, R. Owen, zé7d., p. 10, pl. vi; R. Lydekker, Cat. Foss. 
Rept. B. M., pt. i, 1888, p. 89. 
Loc. M. Purbeck; Swanage. [Skull, wanting extremity of snout; 
Brit. Mus.] T. 
PHOLIDOSAURWS, H. von Meyer, Neues Jahrb., 1841, p. 443. 
MACRORHYNCHUS, W. Dunker, Program. héch-Gewerbschule 
in Cassel, 1844, p. 44. 
meyeri (Dunker), R. Lydekker, Geol. Mag. [3] vol. iv, 1887, p. 311, 
and Cat. Foss. Rept. B. M., pt. i, 1888, p. 88. 
Macrorhynchus meyert, WW. Dunker, Program. héch-Gewerb- 
schule in Cassel, 1844, p. 44; H. von Meyer, in W. Dunker, 
Monogr. norddeutsch. Wealdenbildungen, 1846, p. 74, pl. xx 
(non f. C). 
Loc. Wealden ; Brook, I. of Wight. [Occiput, vertebra, and 
scutes; Brit, Mus.] 
PLACOSAURWUS, P. Gervais, Zool. et Pal. Frang., ed. i, 1848-52, 
p. 260. 
?margariticeps (Gervais), R. Lydekker, Geol. Mag. [3] vol. v, 
1888, p. 111, and Cat. Foss. Rept. B. M., pt. i, 1888, p. 279, 
woodcut 62. 
Varanus ? margariticeps, P. Gervais, Zool. et Pal. Générales, 
sér. 2, 1876, p. 60, woodcut. 
Loc. U. Eocene; Hordwell. [Vertebre,; Brit. Mus.] 
PLASTREMYS, Owen. v. Hyleochelys. 
lata, Owen. v. Hylzochelys lata. 
PLATECARFUS, E. D. Cope, Proc. Boston Soc. Nat. Hist., vol. 
xl, 1869, p. 264. 
? Spe, R. Lydekker, Cat. Foss. Rept. B. M., pt. i, 1888, p. 271. 
Loc. Chalk ; Sussex. [Dental crown ; Brit. Mus., no. 39424.] 
PLATEMWYS, A. Wagler, Syst. Amphib., 1830, p. 135. 
bowerbanki, Owen. v. Podocnemis bowerbanki and Pseudo- 
trionyx delheidi. 
bullocki, Owen. v. Pleurosternum bullocki. 
concinna (Owen), Maack. v. Pleurosternum bullocki. 
dixoni, Owen. v. Hyleochelys belli. 
emarginata (Owen), Maack. v. Hyleochelys emarginata. 
latiscutata (Owen), Maack. wv. Hylochelys latiscutata. 
mantelli, Owen. v. Hylezochelys belli. 
ovata (Owen), Maack. wv. Pleurosternum bullocki. 
