CARBONIFEROUS FISH-FAUNA, 
Pig. 7 c . — Mould of anal fin-spine, indicating the large 
dimensions of its internal cavity ; nat, size. 
7^. — Impression of ornament of lateral face of anal 
fin-spine, showing the nearly parallel tuberculated 
ridges terminating successively at its anterior edge , 
nat. size. 
Plate II. 
pig. i. — Gyracanthides murrayi, sp. nov.; impression of region 
of pectoral fin, showing the finely tuberculated 
outer face of the posterior free pectoral spine («) ; 
the greater part of a pectoral fin-spine, with its 
base ( b ) partly marked by overlying dermal 
tubercles, its exserted portion (c) slightly incom- 
plete at the outer edge and at the distal end ; also 
a small patch of dermal tubercles ( d ) ; nat. size. 
la. — Internal mould of the posterior free pectoral spine, 
taken from the hollow marked (a) in fig. 1 ; seen 
from the outer-lateral face, lacking the apex hut 
showing the radiating structural lines and the 
bevelling of the anterior margin of the spine ; nat. 
size. 
lb. — The same spine, with piece of matrix, seen from 
behind, showing its lateral compression ; nat. size. 
1 c . — The elongate-oval plate, with radiating structural 
lines, closing the aperture of the central cavity 
of the same spine ; nat. size. 
l d. — Structural lines of the same spine ; magnified. 
Idd. — Diagram of hollows in matrix left by decay of 
dermal tubercles, the sharp separating lines not 
seen in the original ; magnified. 
le. — Dine tubercular ornament seen in cavity of fossil 
at a. 
l f. — Diagram of outer aspect of dermal tubercles ; 
magnified, the crimping somewhat exaggerated. 
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