232 PERMIAN FOSSILS. 
from a very perfect specimen belonging to Mr. Bowerbank, the counterpart of which 
is in my own collection. It gives a better idea of the outline of the species than 
Lord Enniskillen’s specimen, as the latter has an unnatural prognathic character in 
consequence of the crushing in of the frontal bones. Fig. ] of Pl. XX VIII represents 
a well characterised young individual of this species in the Collection of the Yorkshire 
Philosophical Society.—P. G. E. 
“Tt will be seen, that I have merged Platysomus parvus into this species. M. 
Agassiz founded it on the figures given by Mr. Winch in the ‘Transactions of the 
Geological Society,’ and not on an examination of the originals: these (which are 
in the Sunderland Museum) I have lately inspected, and I cannot find any difference 
between them and an undoubted P. striatus in the Newcastle Museum. The 
draughtsman of Mr. Winch’s figures has not copied the originals so closely as could 
be desired: he has, in consequence, incorrectly represented the dorsal and the ventral 
fin of the same length, the posterior part of the body foo round, the head too large, 
and the root of the tail (which is injured in the originals) ¢00 slender.”' 
Platysomus striatus occurs at Ferry-Hill (where the beautiful specimen figured and 
belonging to Mr. J. S. Bowerbank was found), and Whitley, in Marl-slate. The so- 
called Platysomus parvus was found in compact Magnesian limestone at Pallion Quarry. 
Family SAUROIDE!, Agassiz. 
Genus Pygopterus, Agassiz. 
Esox, Kriiger. 
PaLmoturyssuM, Blainville. 
NEMOPTERYX, Agassiz. 
SAUROPSIS 5 
PYGOPTERUS MANDIBULARIS, Agassiz. Plate XXIII, fig. 1 a, 6. 
FosstL FISH NOT DETERMINED, Sedgwick. Trans. Geol. Soc. Lond., 2d series, vol. iui, 
p. 118, pl. x, figs. 1-3, 1829. 
NEMOPTERYX MANDIBULARIS, S. SAUROPSIS Scoricus, Agassiz. Arc. Cat. 
PYGOPTERUS — Agassiz. Poiss. Foss., vol. ii, part ii, pp. 76-77, pl. lit, 
hiia. 
Q— SCULPTUS »  Poiss. Foss.,-vol. 11, p. 77. 
= Scortrcus 3 Bronn, Lethza Geognostica, pl. i, p. 128, 1835. 
— MANDIBULARIS _,, Ann. Mag. Nat. Hist., vol. vii, p. 497, 1841. 
— — a Morris, Catalogue, p. 204, 1843. 
— — 3 Rep. 13th Meet. Brit. Assoc., p. 198, 1844. 
O— SCULPTUS as Loc. cit. 
! King, Catalogue, p. 15. 
