﻿44S VCTINOl'TERYGU. 



Rossica, vol. i. (18G0), p. 1586, pi. lv. fig. 12.— Permian ; 

 Kargala. 



Amblypterus tuberculatus : Palceoniscus tuberculatum, E. von Eich- 

 wald, Bull. Soc. Imp. Nat. Moscou, 1857, pt. ii. p. 349, 

 and Leth. Bossica, vol. i. (1860), p. 1585, pi. lv. fig. 11. 

 — Ibid. [University of St. Petersburg.] 



Some fishes from the Lower Permian of Moravia, said to be 

 related to the species from France and Bohemia here assigned to 

 Amblypterus, bear the undefined names of Palceoniscus katholitz- 

 kianus, P. moravicus, and P. promptus (A. Rzehak, Yerhandl. k.-k. 

 geol. Reichsanst. 1881, p. 79). 



The so-called Amblypterus orientalis (E. von Eichwald, Leth. 

 Rossica, vol. i. 1860, p. 1588, pi. lv. fig. 15), possibly identical with 

 the imperfectly defined Tetragonolepis murchisoni (G. Eischer de 

 Waldheim, Bull. Soc. Imp. Nat. Moscou, 1842, p. 463), is of doubt- 

 ful genus, the type specimen being a portion of squamation, with 

 remains of median fins, from the Permian of Kargala, Govt, of 

 Orenburg, Russia. Amblypterus ornatus, E. Emmons (Manual Geol. 

 ed. 2, 1860, p. 183, fig. 161, nos. 1-3), from the Chatham Series 

 of North Carolina, is also founded upon indeterminable Palaeoniscid 

 scales. 



Amblypterus olfersi, L. Agassiz, Poiss. Eoss. vol. ii. pt. i. (1833), 

 pp. 4, 40, from the Upper Cretaceous of Brazil, was subsequently 

 recognized by the same author as referable to the Physostomous 

 bony fish Bhacolepis {ibid. vol. ii. pt. ii. 1844, p. 283). 



Genus EURYLEPIS, Newberry. 



[Proc. Acad. Nat. Sci. Philad. 1857, p. 150.] 



Syn. Meoolepis, J. S. Newberry, Proc. Acad. Nat. Sci. Philad. vol. viii. 

 1856, p. 96 (preoccupied). 



Trunk fusiform. Mandibular suspensorium nearly vertical ; snout 

 rounded ; gape small, and teeth numerous, short, and conical. Eins 

 relatively small, with delicate fulcra ; fin -rays robust, not branching, 

 but merely attenuated distally. Dorsal and anal fins short-based, 

 triangular-acuminate, nearly opposite, the former arising only 

 slightly in advance of the latter ; caudal fin obliquely truncated or 

 exhibiting very slight excavation. Scales smooth or with feeble 

 ornament, often serrated ; two or more series of flank-scales not less 

 than twice as deep as broad. 



The species of this genus are all of very small size, and have only 

 been discovered hitherto in a thin seam of cannel-coal in the Coal- 

 Measures at Linton, Ohio. 



