PAL2EOXISCIDJ3. 
505 
1864, p. 350). The type specimen is an imperfect fish in the 
Museum of Newcastle-upon-Tyne. 
Two portions of large fishes, also closely resembling A. sedgiuicki, 
from the Permian of Kargala, Govt, of Orenburg, Russia, are 
described thus:—• 
Acroleins \macroderma , E. von Eichwald, Bull. Soc. Imp. Nat. 
Moscou, vol. xxs. (1857), pt. ii. p. 349, and Leth. llossica, 
vol. i. (1860), p. 1579, pi. lvi. fig. 9. 
Acroleins rhombifera , E. von Eichwald, Leth. llossica, vol. i. 
(1860), p. 1580, pi. lvi. fig. 8. 
f\ f V r (Tj • s - 
Acrolepis exsculpta (Kurtze). 
1839. Palceoniscus exscidptus, G. A. Kurtze, Comment. Petrefact. 
Mansfeld. p. 19, pi. ii. fig. 1. 
1840. Palceoniscus exscidptus, E. F. Germar, Verstein. Mansfeld. Kup- 
ferschief. p. 21, figs. 6-8. 
1842. Acrolepis ornatus, G. von Munster, Beitr. Petrefakt. pt. v. p. 41. 
[Palaeontological Museum, Munich.] 
1842. Acrolepis exscidptus, G. von Munster, ibid. p. 42, pi. vi. fig. 2. 
(?) 1842. Acrolepis intermedins, G. von Munster, ibid. p. 41. [Palae¬ 
ontological Museum, Munich.] 
1844. Pygopterus humboldti, L. Agassiz (errore), Poiss. Foss. vol. ii. 
pt. ii. p. 74. 
1848. Acrolepis exsculptus, C. G. Giebel, Fauna der Vorwelt, Fische, 
p. 242. 
1861. Acrolepis exsculptus, H. B. Geinitz, Dyas, p. 14. 
1889. Acrolepis exculptus, R. Howse, Guide Local Foss. Mus. New¬ 
castle-upon-Tyne, p. 24. 
Type. Imperfect caudal pedicle and fin. 
[Form and proportions probably as in the type species.] Tuber- 
culations of head and opercular bones frequently fused into short 
ridges. Median fins well ornamented with tuberculations, those of 
the anterior rays elongated. Scale ornament relatively fine, the 
ridges sharp and irregular, rarely reticulating on the abdominal 
flank-scales, but frequently so on the caudal; ridges of principal 
flank-scales often bifurcated, often with intercalations, finest, most 
numerous, and most frequently interrupted towards the hinder 
border ; ridges of caudal scales becoming gradually more branched 
and reticulated towmrds the hinder extremity. 
Form. Sf Loc. Fpper Permian (Kupferschiefer) : Germany. Upper 
Permian (Marl Slate): Durham. 
P. 6299. Remains of head and abdominal region, with impressions 
of the neural arches and traces of a series of small haemal 
