CARBONIFEROUS FISH-FAUNA, 
Plate IY. 
Fig. 1 . — Gyracanthides murrayi, sp. nov.; impression of part of 
large pectoral tin-spine, incomplete at both ends, 
but showing a long extent of the narrow, smooth 
base of insertion (top of figure) ; nat. size, 
la, lb, 1 c. — Gutta-percha impression of the same fossil, upper 
or lower view, sharp outer edge, and grooved inner 
face respectively; nat. size. 
Id. — Part of the tuberculated, ridged ornament of the 
same; thrice nat. size. 
Plate Y. 
Fig. 1. — Gyracanthides murrayi, sp. nov.; caudal region in side 
view, with remains of abdominal region, showing 
part of one pelvic fin-shape (a) with the tip of the 
other (b) ; 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. 
lb. — Diagram of outer aspect of dermal tubercles ; four 
times nat. size, with the bosses represented of too 
angular a shape. 
hig. 2. Ditto, fragment oi trunk, apparently drawn upside 
down, displaying dermal tubercles, the base of a 
pelvic fin-spine (a), and the mould of part of the 
anterior dorsal fin-spine (on the edge of the fossil 
but shown separately at b); nat. size. 
2a.— Partially fractured dermal tubercles, thrice uat. 
size. 
tig. 3. Acanthodes australis, sp. nov.; caudal fin; nat. size. 
3a. — Scales; magnified. 
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