458 
ACTIXOPTERYGII. 
anterior part of the pectoral fins ; fulcra minute. Dorsal and anal 
fins not excessively elongated, remote, almost^or completely opposed 
to each other. Scales small, very slightly imbricating, and ex¬ 
ternally striated ; those of the flank deep and narrow, with relatively 
large peg-and-socket articulation. 
63 —--: 
Nematopty chins greenocki, Traquair. 
1844. Pygopterus yreenockii, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. 
p. 78 (undefined). 
1866. Pygopterus yreenockii, E. H. Traquair, Proc. Eoy. Soc. Edinb. 
vol. v. p. 597. 
1867. Pygopterus yreenockii , E. PI. Traquair, Trans. Eoy. Soc. Edinb. 
vol. xxiv. p. 701, pi. xlv. 
1872. ^ Pygopterus elegans, C. W. Peach, Eep. Brit. Assoc. 1871, Trans. 
^Sect. p. 109 (name only). [Edinburgh Museum.] 
18/5. Nematoptychius yreenockii , E. H. Traquair, Ann. Mag. Nat. Hist. 
[4] vol. xv. p. 258, pi. xvi. figs. 7-11. 
18/7. Nematopty chius gracilis, E. H. Traquair, Proc. Eov. Soc. Edinb. 
^vol. ix. p. 262. [Collection of Dr. E. H. Traquair.] 
1877. Nematopty chius yreenockii, E. H. Traquair, Quart. Journ. Geol. 
Soc. vol. xxxiii. p. 577, and Ganoid Fishes Brit. Carb. Form. (Pal. 
Soc.), pi. i. figs. 7-11. 
1879. Nematopty chius yreenockii, E. H. Traquair, Proc. Eov. Phvs. 
Soc. Edinb. vol. v, pp. 118, 128. 
H.JO. Nematopty chius yreenockii , E. H. Traquair, Proc. Eov. Soc. 
Edinb. vol. xvii. pp. 891, 398. 
Type. Imperfect fish ; Edinburgh Museum. 
Maximum depth of trunk contained more than five times in the 
total length: dorsal contour of abdominal region scarcely arched. 
Head elongated, small, and snout pointed ; head and opercular appa¬ 
ratus occupying nearly one quarter of the total length; maxilla orna¬ 
mented by striae parallel to the hinder and upper margins, passing 
into irregular tubereulations near the alveolar border; dentary 
bone externally tuberculated or irregularly rugose. Pelvic fins 
well developed, arising midway between the pectoral pair and the 
anal. Dorsal and anal fins similar in form, somewhat longer than 
high, the dorsal slightly smaller than the anal and arising immedi¬ 
ately in front of the latter. Scales externally ornamented with very 
fine, wavy ridges, sometimes branching and anastomosing, directed 
obliquely downwards. 
Form, if' Loe. Calciferous Sandstone Series : Midlothian and Fife- 
shire. Carboniferous Limestone Series : Midlothian and Lanark¬ 
shire. 
