132 
Geology of Sydney. 
Ceratodus, many Belonostomus of all sizes, Cleithrole. 
pis, &c., and many which are at present unknown to 
me. They are chiefly, if not altogether, ganoids, and 
many quite new, at least to Australia. Some have 
been much broken in the quarry, others injured subse- 
quently; but all were otherwise in a wonderful state 
of preservation. They had evidently been all killed 
at the same moment, and immediately buried. Some 
are quite straight and in their natural posture, 
others convulsed and distorted. One large fish, for 
example, has the right pectoral fin thrown up on the 
same plane as the dorsal, with the under side of the 
head and fore-quarter, and the right side of the rest 
of the body presented, showing both that the notochord 
was cartilaginous, and that the fish died suddenly in 
its struggles. Many others are twisted and bent 
double ; and all seem to corroborate the speculation 
that they were killed by a sudden influx of ice-cold 
mud or muddy water into the tepid lagoon where they 
had been living. There are also with them beautifully- 
preserved ferns, Phyllotheca and the like, which had 
evidently undergone no decomposition before they 
were silted up, but had been buried at once in the 
mud of the torrent which had torn them away. Be- 
sides the fish and vegetable remains, there are also two 
Labyrintliodont remains.” 
The following list shows the more important 
animals, which we know from their fossils lived while 
the Triassic rocks hereabouts were being laid down : — 
