978 CLASS PISCES. 



stone (Middle Permian) of Germany and England ; and one species 

 has been said to occur in the English Trias. That species is, how- 

 ever, now referred to the Dapediidce ; but a true Paltzoniscus is 

 recorded from the Hawkesbury beds of New South Wales, which 

 may be of Triassic age. The remaining better known genera are 

 Elonichthys, from the Carboniferous of Europe and America ; Acro- 



Fig. 915. — Rhabdolepis macroptera ', from the Lower Permian of Saxony. Reduced. 

 (After Agassiz.) 



/epi's, ranging from the Permian to the Carboniferous, and perhaps 

 to the Devonian, of Europe ; Nematoptychius, Cydoptychius, Micron- 

 odus, and Gonatodus, from the British Carboniferous ; the gigantic 

 Amblypterus, of the German Permian ; Rhadinichthys, from the Car- 

 boniferous of both Europe and North America ; Eurylepis, from 

 the Carboniferous of Ohio ; Holurus, Canobius, and Phanerosteon, 

 of the Scottish Carboniferous ; Pygopterus, of the German Permian ; 

 Myriolepis, from the Hawkesbury of New South Wales ; Urosthenes, 

 from the underlying Newcastle group of the latter country ; Gyro- 



Fig. 916. — Palceoniscus macropomus ; from the Middle Permian of Germany. Reduced. 

 (After Traquair.) 



fepi's, from the Middle Trias of the Continent ; and Oxygnathus, 

 Cos7?iolepis, Thrissokpis, Centrokpis, and Lissolepis, from the Eng- 

 lish Lias. Here also may be mentioned the genera Sphcerolepis^ of 

 the Permian of Bohemia, and Coccolepis, of the Kimeridgian of Bavaria, 

 which, although having cycloidal imbricating scales, appear to be 

 allied to the present family. 



