448 
ACTINOPTERYGTI. 
Rossica, vol. i. (1860), p. 1586, pi. lv. fig*. 12.—Permian; 
Ivargala. 
Amblypterus tuberculatus : Palceoniscus tuberculatus, E. von Eich- 
wald, Bull. Soc. Imp. Nat. Moscon, 1857, pt. ii. p. 349, 
and Leth. Rossica, 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 Erance and Bohemia here assigned to 
Amblypterus, bear the undefined names of Palceoniscus kaiholitz- 
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 Xargala, 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 Palieoniscid 
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 Rhacolep 
Hems (l hid, vol. ii. pt. 1*91844 , jj. 
fiA Pt oa c P0 £. 
283). 
a ew berry. 
A 7 *- 
■ [Proc. Acad. Na? Sci/Philad. 1857, p. 150.] 
iQ 
5 5 
Syn. Mecolepis , J. S. Newberry, Proc. Acad. Nat. Scl. 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. 
