CARBONIFEROUS FISH-FAUNA, 
Puate IV. 
Fig. 1.—Gyracanthides murrayi, sp. noy.; impression of part of 
large pectoral fin-spine, incomplete at both ends, 
but showing a long extent of the narrow, smooth 
base of insertion (top of figure); nat. size. 
la, 1b, 1e.—Gutta-percha impression of the same fossil, upper 
or lower view, sharp outer edge, and grooved inner 
face respectively; nat. size. 
1ld.—Part of the tuberculated, ridged ornament of the 
same; thrice nat. size. 
PLATE VY. 
Fig. 1.—Gyracanthides murrayi, sp. noy., caudal region in side 
view, with remains of abdominal region, showing 
part of one pelvic fin-shape (a) with the tip of the 
other (0); traces of the anterior dorsal fin and its 
spine (c); the posterior dorsal, anal, and caudal 
fins; also part of one of the posterior free pectoral 
spines; nat. size. 
la.—Fragment of basal end of pelvic fin-spine, showing 
hollow mould before it was completely uncovered; 
slightly magnified. 
1b.—Diagram of outer aspect of dermal tubercles; four 
times nat. size, with the bosses represented of too 
angular a shape. 
Fig. 2.—Ditto; fragment of trunk, apparently drawn upside 
down, displaying dermal tubercles, the base of a 
pelvic fin-spine (@), and the mould of part of the 
anterior dorsal fin-spine (on the edge of the fossil 
but shown separately at 4); nat. size. 
2a.—Partially fractured dermal tubercles, thrice nat. 
size. 
Fig. 3.—Acanthodes australis, sp. noy.; caudal fin; nat. size. 
da.—NScales ; magnified. 
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