CARBONIFEROUS FISH-FAUNA, MANSFIELD DISTRICT, VICTORIA. 
EXPLANATION OF PLATES. 
PuatE I. 
Fig. 1.—Gyracanthides murrayi, sp. noy.; one side of type- 
specimen, showing anterior free pectoral spine (a), 
oval plate closing base of posterior free pectoral 
spine (4), pectoral fin-spine chiefly in impression 
(c), and dermal tubercles (d); nat. size. 
la.—Diagrammatic drawing of horizontal section of 
dermal tubercles, showing the pulp-cavity; about 
three times nat. size. 
Fig. 2.—Ditto; impression of anterior free pectoral spine, 
showing external tubercular ornament and narrow 
smooth inserted base; nat. size. 
. 8.— Ditto; impression of a larger incomplete specimen ; nat. 
size. 
Fig. 4.—Ditto; abraded imperfect specimen, outer aspect, 
showing texture, nat. size; also the same, twice 
nat. size (4a), and one ridge further enlarged (48). 
Fig. 5—Ditto; imperfect impression of outer aspect; nat. size, 
and also twice nat. size. (5a). 
Fig. 6.—Ditto; two ridges of the preceding specimen; much 
enlarged. 
Fig. 7 —Ditto; ventral aspect of trunk, lacking head and end of 
tail, showing internal mould of one anterior free 
pectoral spine (@), impressions of part of both 
pectoral fin-spines (0, 5'), internal moulds of the 
pelvic fin-spines (c, c¢'), impressions of some 
ventral dermal tubercles (d), and both internal 
and external moulds of the small, apparently 
displaced, anal fin-spine (e); two-thirds nat. size. 
7a.—Internal mould of anterior free pectoral spine ; nat. 
size. 
7b.—Outer view of dermal armour, showing rounded 
bosses on the tubercles ; magnified. 
[25] rt 
