224 PERMIAN FOSSILS. 
PALAONISCUS ELEGANS, Sedgwick. Tennant, Strat. List, p. 89, 1847. 
— — Bs King, Catalogue, p. 14, 1848. 
— — Howse, Trans. T. N. F. C., vol. i, p. 232, 1848. 
— — Geinitz, Versteinerungen, p. 5, 1848. 
Palaoniscus elegans is one of the rarest fishes of the Permian System. It differs 
from the other species of this genus in its more elegant form and well-propor- 
tioned dimensions, which fully entitle it to the specific name it has received. The 
head bears the proportion of one fifth of the entire length; all its component bones are 
ornamented with diverging furrows. The body is an elongated oval. All the fins are 
proportionally small: the transverse articulations of the dorsal and anal are far apart ; 
and the rays are bifurcated for half their length. The anterior borders of these fins 
are furnished with a fringe of very small rays attached to the larger ones. The rays 
of the caudal fin are very slender, and dichotomize frequently. The transverse articu- 
lations of the upper lobe are very close together: in the lower lobe they are more 
distant.'—P. G. E. 
Paleoniscus elegans occurs in Marl-slate at Midderidge, East Thickley, Whitley, 
Cullercoats, and Ferry Hill. The beautiful specimen figured, and now in the New- 
castle Museum, was collected by myself at Aycliff in the same bed. 
PALMONISCUS GLAPHYRUS, Agassiz. Plate XXII, figs. 3, (7) 4 4. 
PALMONISCUS GLAPHYRUS, Agassiz. Poiss. Foss., vol. ii, p. 98, pl. xe, figs. 1, 2. 
= = Ann. and Mag. Nat. Hist., vol. vu, p. 495, 1841. 
= —_ Morris, Catalogue, p. 201, 1843. 
— _ Rep. of 13th Meet. Brit. Assoc., p. 196, 1844. 
— — De Verneuil, Bull. Soc. Géol. de France, 2™* série, 
vol. i, p. 38, 1844. 
— — ‘ Geol. Russ., vol. 1, p. 227, 1845. 
os — sh Tennant, Strat. List, p. 89, 1847. 
_- — <5 King, Catalogue, p. 14, 1848. 
— — Howse, Trans. T. N. F. C., vol. i, p. 233, 1848. 
— — ne Geinitz, Versteimerungen, p. 5, 1848. 
In my ‘Catalogue, p. 14, it is stated that the Newcastle Museum possesses a 
specimen from the Marl-slate, Whitley (vide Pl. XXII, fig. 4), resembling the 
Palaeoniscus angustus of Agassiz, but with this difference, that it has both lobes of the 
tail of the same length: in other respects, as the relative position of the fins, and the 
arrangement of the scales, it agrees with the latter. From the followimg observa- 
tions, however, communicated to me by Sir Philip Egerton, it would appear that the 
specimen belongs to the present species. 
“The most important features in the Whitley specimen are the position of the 
dorsal fin, which is placed farther back than in the other Permian species,—the 
1 This description is abridged from the more copious article in the ‘ Poissons Fossiles.’ 
