222 PERMIAN FOSSILS. 
The specimen alluded to, the only one that has been procured, was found in the 
Lower New Red Sandstone near Westoe, by Mr. William Hutton, to whose unceasing 
labours, as Honorary Secretary, the high standing of the Newcastle Museum is to be 
chiefly attributed. 
Genus Gyropristis, Agassiz. 
GYROPRISTIS OBLIQUUS, Agassiz. 
GYROPRISTIS OBLIQUUS, Agassiz. Poiss. Foss,, vol. ii, p. 177. 
— — bp Report 13th Meeting Brit. Assoc., p. 198, 1844. 
— _ AS De Verneuil, Bull. Soc. Géol. de France, 2™° série, vol. i, 
p- 38, 1844. 
— a 35 Geol. Russ., vol. 1, p. 226, 1845. 
This Ichthyodorulite is stated to be from the Magnesian Limestone near Belfast ; 
but it is doubtful whether the rock in which it was found belongs to the Permian, 
or to the Triassic system. 
Order GONIOLEPIDOTI, Agassiz. 
Family LEPIDOSTEI, Agassiz. 
Genus Palgoniscus, Agassiz. 
Cuuppa, Blainville. 
PaLmoruRissum, Blainville. 
PaL#ONIscuM, Agassiz, 1833. 
The occurrence of fishes, belonging to this genus, in the Permian Marl Slate of 
England, was first made known by the Memoir of Professor Sedgwick, published in the 
‘Transactions of the Geological Society of London,’ 2d series, vol. ii, p. 37. M. de 
Blainville, to whom the original specimens were submitted, recognised their affinity to 
the fishes from the Kupfer-schiefer, arranged by him under the genus Palgothrissum, 
and considered two species as identical with those found in this formation. The 
more extensive researches of Professor Agassiz in this department of palzeontology 
enabled him, on his visit to England in 1834, to detect discrepancies which had 
escaped M. de Blainville’s observation, and consequently to establish no less than five 
new species of this genus from the Marl Slate of the North of England. The 
descriptions of these species, published in the ‘ Poissons Fossiles,’ are so copious and so 
accurate, that the reader is referred to that work for the details of the specific 
characters.—P. G. H.1 
1 The passages bearing these initials are contributed by Sir Philip Grey Egerton. 
