2G 
PlIOLIDOPHORUS AUSTRALIS Sp. 710V. 
Plate IV, Fig. 9. 
Ohs. — This species is known only by the type specimen, which is 
shown of the natural size in PI. IV, Pig. 9. 
Sp. Char . — A small species attaining a length of at least OT m. 
Length of head with opercular apparatus nearly equalling maximum depth 
of trunk, and occupying one-fifth of total length of fish. Pelvic fins, each 
with six or seven rays, arising much nearer to the anal than to the pectoral 
fins ; dorsal fin with twelve rays, directly opposed to the space between the 
pelvic and anal fins ; anal fin relatively small, with about ten rays. Scales 
moderately deepened on the flank, apparently smooth. 
General Form . — The type specimen is displayed in direct side view, 
and probably shows the true shape and proportions of the fish. The trunk is 
regularly fusiform, and the caudal pedicle is remarkably slender. 
Head— The head appears to be complete in the fossil, though none of 
its details can be clearly seen. In both jaws there are impressions of a close 
series of slender conical teeth, which are unusually large. 
Appendicular Skeleton . — There are remains of both pectoral fins, which 
must have been inserted close to the ventral border. The pelvic fins arise 
much nearer to the anal fin than to the pectorals : one clearly comprises six 
or seven rays, which are stout at the base though finely divided distally, but 
the foremost preserved is not fringed with fulcra. The dorsal fin, consisting 
of twelve rays, is directly opposed to the space between the pelvic and anal 
fins, and does not exhibit any distinct evidence of fulcra. The anal fin is only 
about half as large as the dorsal, with approximately ten crowded rays, which 
are finely divided distally. Small fulcra are observable at the origin of the 
anal fin, and are very conspicuous on both lobes of the symmetrically 
forked caudal fin. 
Squamation. — The scales are badly preserved, and do not exhibit any 
traces of ornamentation. Those of the dorsal region and on the caudal pedicle 
are nearly equilateral, without any remains of enlarged ridge-scales. Those 
of the middle of the flank are slightly deepened. 
Affinities. — Though evidently representing the typical section of the 
genus Fholidophorus, this species is too imperfectly known for the more 
exact determination of its relationships. 
