CARBONIFEROUS FISH-FAUNA, 
Fig. 7c.-—Mould of anal fin-spine, indicating the large 
dimensions of its internal cavity; nat. size. 
7d.—Impression of ornament of lateral face of anal 
fin-spine, showing the nearly parallel tuberculated 
ridges terminating successively at its anterior edge ; 
nat. size. 
Puate II. 
Fig. 1.—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 (0) 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. 
1a.—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 but 
showing the radiating structural lines and the 
bevelling of the anterior margin of the spine; nat. 
size. 
16.—The same spine, with piece of matrix, seen from 
behind, showing its lateral compression ; nat. size. 
le.—The elongate-oval plate, with radiating structural 
lines, closing the aperture of the central cavity 
of the same spine; nat. size. 
1d.—Structural lines of the same spine; magnified. 
ldd.—Diagram of hollows in matrix left by decay of 
dermal tubercles, the sharp separating lines not 
seen in the original; magnified. 
le.—Fine tubercular ornament seen in cavity of fossil 
at a. 
1f—Diagram of outer aspect of dermal tubercles; 
magnified, the crimping somewhat exaggerated. 
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