286 Mr. A. 8S. Woodward—Palwichthyological Notes. 
4. Ona new Paleoniscid Fish from Siberta. 
Fish-remains have already been described by Dr. J. V. 
Rohon* from some yellowish fissile marls in the neighbour- 
hood of the Upper Jenissei, in the Government of Tomsk, 
and the present writer has had the privilege of examining 
the original specimens in the Museum of the Imperial Aca- 
demy of Sciences at St. Petersburg. The collection is only 
small, and a Swedish geologist, Herr Martin, has thus done 
good service by obtaining a further series of specimens 
apparently from the same formation, and presenting them to 
the Royal State Museum, Stockholm. Herr Martin’s collec- 
tion was made at Medwiesko, near Atjinsk, in the Government 
of Jenissei, not very far from the locality whence Dr. Rohon’s 
fossils were discovered ; and the present writer is indebted to 
the kindness of Professor Gustav Lindstrém for the oppor- 
tunity of carefully studying the new series. Only two genera 
and species are represented, one an Acanthodian described by 
Dr. Rohon under the name of Acanthodes Lopatint, the other 
a Paleoniscid not hitherto determined. 
Dr. Rohon regards the stratum in which the Acanthodians 
occur as probably Devonian. ‘The species just mentioned, 
however, has the reduced pelvic fin-spines only found in the 
typical Permian and Carboniferous forms of Acanthodes; the 
associated Gyrolepidotus Schmidti has not an early Paleozoic 
aspect; and the Paleoniscid now to be described is most 
nearly related to Permian and Triassic genera. It is there- 
fore very probable that the fish-bearing marls of the Upper 
Jenissei will eventually prove to belong to the Permian 
formation. 
GANOLEPIS, gen. nov. 
Trunk elegantly fusiform, more or less elongated. Man- 
dibular suspensorium oblique, and dentition comprising 
conspicuous well-spaced conical laniaries ; external head and 
opercular bones completely ornamented with striations, 
vermiculating rug, and dots of ganoine. Fins small, without 
fulcra, and the rays delicate, distally bifurcated. Dorsal and 
anal fins triangular, the former opposed to the space between 
the pelvic and anal fins ; upper caudal lobe slender and the 
caudal fin forked. Scales large and thick, covered with 
ganoine and ornamented with transverse ridges, usually 
serrated at the hinder border; principal flank-scales not much 
deeper than broad, and no enlarged series of ridge-scales ; 
lateral line conspicuous. 
* J. V. Rohon, “ Ueber fossile Fische vom oberen Jenissei,” Mém. 
Acad. Inip. Sci. St.-Pétersboure, [7] vol. xxxvi. no. 13 (1889). 
