13 
(microlestes). Sir Philip Egerton had pointed out that the 
fishes showed Triassic affinities, while on the other hand the 
Reptilia were undoubtedly of close relationship to the Lias. 
We had here the first known remains of those genera 
Ichthyosaurus and Plesiosaurus which were to form a marked 
feature and culminate in the Liassic division of the Jurassic 
period, while all the reptiles (save Labyrinthodon) and amphibia 
of the Trias were absent. Large vertebre of Ichthyosauri 
and Plesiosawri have been found in the bone beds of the 
spot they were standing on. The fish remains, consisting 
of scales, spines, and teeth, were of intense interest. Three or 
four genera were represented in the Trias, and others extended 
up into the Lias. The most remarkable fish was Ceratodus, of 
which genus nine or ten species have been obtained. Founded 
by Agassiz on a single tooth, it was one of the marvels of 
Zoology, that a living fish of the same genus had, long 
subsequent to the founding of the genus, been discovered to 
exist in certain Australian rivers; the Barramunda or mud fish 
of the Darling River. It belongs to the order Dipnot, charac- 
terized by the possession of a true lung as well as of gills, 
enabling it to exist for a long time out of water, embedded in 
the half-dried mud of its native creeks. It furnishes us with 
another proof that in a certain sense some Australian animals 
represent an old world fauna dating so far back as Devonian and 
Jurassic times. The commonest fishes here at Garden Cliff are - 
Hybodus and Saurichthys ; every slab of the bone bed contains 
some of their scales and spines. The small star-fish Ophiolepis 
Damesit, first found at Westbury, is the sole Echinoderm yet 
recorded. Some fifty species of Lamellibranchiate mollusca 
occur, of which Pullastra arenicola, Cardium Rheticum, and 
Avicula contorta are most abundant. The general conclusion to 
be drawn from a study of the fauna was that the Rhetics were 
transition beds between the lacustrine and estuarine conditions 
of the Keuper, and the deep seas of the Lias; the land surface 
of the epoch, which must have been a very long one, furnishing 
an occasional mammal and numerous reptiles to leave their 
bones and coprolites in the shallow estuarines and seas of the 
