ries; spine-bearing
fishes, like the Port-Jackson Shark, are abundantly represented
by genera such as _Acrodus_ and _Strophodus_; and lastly, the
genus _Trigonia_, now exclusively Australian, is represented
in the Oolites by species which differ little from those now
existing. Moreover, the discovery during recent years of the
singular Mud-fish, the _Ceratodus Fosteri_ in the rivers of
Queensland, has added another and a very striking point of
resemblance to those already mentioned; since this genus of Fishes,
though preeminently Triassic, nevertheless extended its range
into the Jurassic. Upon the whole, therefore, there is reason
to conclude that Australia has undergone since the close of the
Jurassic period fewer changes and vicissitudes than any other
known region of the globe; and that this wonderful continent
has therefore succeeded in preserving a greater number of the
characteristic life-features of the Oolites than any other country
with which we are acquainted.

LITERATURE.

The following list comprises some of the more important sources of
information as to the rocks and fossils of the Jurassic series:--

(1) 'Geology of Oxford and the Thames Valley.' Phillips.
(2) 'Geology of Yorkshire,' vol. ii. Phillips.
(3) 'Memoirs of the Geological Survey of Great Britain.'
(4) 'Geology of Cheltenham.' Murchison, 2d ed. Buckman.
(5) 'Introduction to the Monograph of the Oolitic Asteriadae'
(Palaeontographical Society). Wright.
(6) "Zone of Avicula contorta and the Lower Lias of the South of
England"--'Quart. Journ. Geol. Soc.,' vol. xvi., 1860. Wright.
(7) "Oolites of Northamptonshire"--'Quart. Journ. Geol. Soc.,'
vols. Xxvi. and xxix. Sharp.
(8) 'Manual of Geology.' Dana.
(9) 'Der Jura.' Quenstedt.
(10) 'Das Floetzgebirge Wuerttembergs.' Quenstedt.
(11) 'Jura Formation.' Oppel.
(12) 'Paleontologie du Departement de la Moselle.' Terquem.
(13) 'Cours elementaire de Paleontologie.' D'Orbigny.
(14) 'Paleontologie Francaise.' D'Orbigny.
(15) 'Fossil Echinodermata of the Oolitic Formation'
(Palaeontographical Society). Wright.
(16) 'Brachiopoda of the Oolitic Formation' (Palaeontographical
Society). Davidson.
(17) 'Mollusca of the Great Oolite' (Palaeontographical Society).
Morris and Lycett.
(18) 'Monograph of the Fossil Trigoniae' (Palaeontographical Society).
Lycett.
(19) 'Corals of the Oolitic Formation' (Palaeontographical Society).
Edwards and Haime.
(20)