478 
ACTIN'OPIERYGTI. 
1835. Pcdceoniscus comtus, L. Agassiz, ibid. p. 97, pi. x. b. figs. 1-3. 
1835. Pcdceoniscus freieslebeni , F. A. Quenstedt, Wiegmann’s Archiv 
Naturg. yoI. ii. p. 94. 
1839. Pcdceoniscus freieslebeni , G-. A. Kiirtze, Comment. Petrefact. 
Mansfeld. p. 12. 
1840. Pcdceoniscus freieslebeni , E. F. Germar, Verstein. Mansfeld. Kup- 
ferscliief. p. 12, figs. 9-14. 
1849. Pcdceoniscus comptus, W. C. Williamson, Phil. Trans, p. 445, 
pi. xl. fig. 7. 
1850. Palceoniscus comtus, Sir P. Egerton, in King’s Permian Foss. 
(Palmont. Soc.), p. 223, pi. xxi. fig. 1. 
1850. Palceoniscus elegans, Sir P. Egerton, ibid. p. 223, pi. xxii. fig. 1. 
1855. Pcdceoniscus freieslebeni, F. MUoy, Brit. Paleeoz. Foss. p. 606. 
1855. Pcdceoniscus elegans, F. MUoy, ibid. p. 605. 
1861. Palceoniscus freieslebeni, H. B. Geinitz, Dyas, p. 15, pi. vi. 
figs. 4-7, pi. vii. fig. 1. 
1861. Palceoniscus elegans , H. B. Geinitz, ibid. p. 16, pi. vii. fig. 2. 
1877. Palceoniscus comptus, II. H. Traquair, Ganoid Fishes Brit. Carb. 
Form. (Pal. Soc.), pi. i. figs. 4, 6. 
1877. Palceoniscus freieslebeni, R. H. Traquair, Quart. Journ. Geol. Soc. 
vol. xxxiii. p. 557. 
1887. Palceoniscus freieslebeni, K. A. von Zittel, Handb. Palseont. 
vol. iii. p. 190, woodc. figs. 198, 201, 202. 
1889. Palceoniscus frieslebeni, R. Howse, Guide Coll. Local Foss. Mus. 
Nat. Hist. Soc. Newcastle-upon-Tyne, pp. 21, 24. 
Type. Nearly complete fishes ; Paris Museum of Natural History. 
The type species, attaining a maximum length of about OB. 
Trunk regularly fusiform and the caudal pedicle robust; greatest- 
depth contained about five and a half times in the total length. 
Head and opercular apparatus occupying nearly one-fifth of the 
total length ; cranial bones marked with coarse, closely arranged 
vermiculating rugse and elongated tubercles of ganoine. Fin-rays 
broad, covered with ganoine, and ornamented as the scales. Pelvic 
fins situated much nearer to the anal than to the pectoral pair, 
arising immediately in advance of the origin of the dorsal. Dorsal 
fin at least as high as long, larger than the anal. Scales of 
moderate size, marked in front with a few irregular, short, trans¬ 
verse grooves, in the hinder half with sparse elongated pittings, 
and the hinder margin denticulated except in those towards the 
extremity of the caudal pedicle. 
Form, df Loe. Upper Permian (Kupferschiefer): Thuringia, 
Saxony, and Hesse. Upper Permian (Marl Slate and Lower Mag¬ 
nesian Limestone); Durham and Northumberland. 
