58 ON SOME AUSTRALIAN TERTIARY 
(Jour. Geol. Soc., vol. 34, p. 193) from the Lias of Warwickshire, 
which is very like our species, but it is attached while the present 
is free. ‘The following is the diagnosis :— 
Family Astreip®. Diy. LirnopHyLiiace2. 
Monrrrvantra discus. Oorallum circular, depressed, convex, 
_ but slightly Sopiened | in the centre. Costa ‘corresponding with 
septa, faintly visible under the a covered with rather large 
but faint rounded geaoniee: 7 a thick, smooth, showing 
scarcely any concentric lines of gr arg Systems six, cycles s four 
pta moderately thick, ficial ca finely dentate, the serrations 
extending as ridges far along the higher orders ; moderately 
nul Primaries = always free tothe centre. Tertiaries 
curving round a and joining secondaries at about three-fifths from 
centre, but the secondaries are not subsequently thicker. Fourth 
cud and join the primaries close to the centre. Diameter, 
alt. 2 millims. Muddy Creek ; not very abundant 
e this ti 
—— _ and from the Professor’ 8 description I judge the 
differe o be that it has a columella, the septa do not unite 
in ‘daira inaaed here described, and the ehdvtheos i is not abundant. 
In all other respects they might easily be mistaken for one 
another. 
The next fossil I have to describe is one of most singular and 
interesting characters. Itis a combination of some of the lead 
ing cha aol isties of several families and sub-families. It is 
a Turbinolidian coral with pali, withogk a columella and a per- 
the wall, Sapna ier ban are very ere the 
wall which separates them becomes little more than a eet 
verse bar, an arrangement which aint us of Porites. There 
