TERTIARY FRESH WATER FISHES FROM SOUTHERN QUEENSLAND. 167 
There are 30 vertebrae, 12 abdominal and 18 caudal, which are hollowed 
out dorsally and ventrally, leaving a strong lateral lamina. In one specimen 
(No. 5) the mid-caudal vertebrae are compressed, but the number remains 
constant (.see Plate IV). The posterior ribs are attached to stout parapophyses. 
There are eight spines in the spinous dorsal, the fourth being the longest. 
No gap separates the soft and spinous dorsals, and the soft dorsal has one 
anterior spine, slightly longer than the last in the spinous dorsal, and 1 1 or 
12 jointed rays. The interneurals are laminate. The anal fin has three spines, 
one small anteriorly and the other two subequal and strong, and there are 
9 jointed rays. In the caudal (Fig. 10) there are 17 or 18 jointed rays, with 
small fulcral spines dorsally and ventrally. The pelvics have a single anterior 
spine. The scales are moderately large, (25 in transverse series), ctenoid over 
Text-figure 10 .— Percolates antiquus sp. nov, [RP/P] 96. X 2. Detail of caudal fin. 
most of the body, and cycloid on the opercular apparatus. The ctenoid scales 
are subrectangular and the cycloid are subcircular. Both the opercles and 
cheeks are scaly. 
c 
Text-figure 11 . — Percalatcs antiquus sp. nov. Pre-opercular bones, o, [RP/P] ]o; 6, [RP/P] 
13 ; c, [RP/P] 1 ; d, [RP/P] 16 x about 1. 
