542 
ACIIXOPTERYGII. 
and narrow, with large anterior inner keel, and a large, broad peg- 
and-socket articulation often extending nearly the entire width of 
the scale ; scales dorsally and ventrally and towards the caudal 
pedicle less deep in {-apportion to their breadth ; scales of upper 
caudal lobe lozenge-shaped. Eidge-scales in advance of dorsal and 
anal fins small, those of the upper caudal lobe very large. 
Platysomus gibbosus (Blainville). 
[Plate XV. fig. 5.] 
1708. Rhombus diluvianus major et minor , J. J. Scheuchzer, Piscium 
Querebe et Vindiciae, pi. iv. 
1719. Rhombus diluvianus minor, P. Wolfart, Hist. Nat. Hassiae inf. 
pi. xiii., pi. xiv. fig. 1. 
1815. “ Flat Fish,” W. E. Clanny, Annals of Philosophy, vol. vi. p. 115, 
with plate. * 
1817. “ Fish (? Chcetodon)j N. J. Winch, Trans. Geol. Soc. vol. iv. p. 9, 
pi. ii. 
1818. Stromateus gibbosus, H. D. de Blainville, Nouv. Diet. d’Hist. 
Nat. vol. xxvii. p. 322. 
1818. Stromateus major, H. D. de Blainville, ibid. p. 322. 
1824. Stromateus knorrii, E. F. Germar, Leonhard’s Mineral. Taschen- 
buch, p. 70, pi. ii. 
1824. Stromateus angulatus, E. F. Germar, ibid. p. 71, pi. iii. fig. 2. 
1829. “FossilFish,” A. Sedgwick,Trans. Geol. Soc. [2] vol. iii. pi. xii. 
figs. 3, 4. 
1833-35. Platysomus gibbosus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. 
pp. 6, 164, pi. xv. 
1833-35. Platysomus rhombus, L. Agassiz, ibid. pp. 6, 167, pi. xvi. 
[Paris Museum of Natural History.] 
1833-35. Platysomus striatus, L. Agassiz, ibid. pp. 6, 168, pi. xvii. 
figs. 1-4 (includes TJropteryx striatus, Ag. MS.). [Museum of 
Newcastle-upon-Tyne.] 
1833-35. Platysomus parvus, L. Agassiz, ibid. pp. 6,170, pi. xviii. fig.3. 
1839. Platysomus gibbosus, G. A. Kurtze, Comment. Petrefact. Mans- 
feld. p. 22. 
1839. Platysomus rhombus, G. A. Kurtze, ibid. p. 24. 
1840. Platysomus gibbosus, E. F. Germar, Verstein. Mansfeld. Kup- 
fersehief. p. 25. 
1840. Platysomus rhombus, E. F. Germar, ibid, p, 26. 
1842. Platysomus intermedins, G. von Munster, Beitr. Petrefakt. pt. v. 
p. 43. [Palaeontological Museum, Munich.] 
1850. Platysomus striatus, AY. King, Permian Foss. (Palaeont. Soc.), 
p. 231, pi. xxvii. fig. 1, pi. xxviii. fig. 1. 
1855. Platysomus striatus, F. M‘Coy, Brit. Palaeoz. Foss. p. 614. 
1861. Platysomus gibbosus, H. B. Geinitz, Dyas, p. 8, pi. vi. figs. 1-3. 
1861. Platysomus intermedins, H. B. Geinitz, ibid. p. 9. 
