DESCRIPTIONS OF NEW SPECIES OF CORALS 
FROM THE AUSTRALIAN TERTIARIES. 
By J. Dennant, F.G.S., Hon. Member. 
PARTE 1: 
With Priates [X.—X. 
[Read October 3, 1899. ] 
In this communication the descriptions of species belonging to 
the family Eupsammide are continued. 
Trematotrochus complanatus, spec. nov. PI. ix., figs. la, b. 
Corallum small, free, much compressed, especially inferiorly, 
and contracted slightly at the summit. In general outline it is 
a flattened cone, of which the laterally rounded base forms the 
apex. Calice shallow and elliptical, with its diameters in the 
ratio of 100 to 66. 
Septa in six systems with three complete cycles. The primaries 
are the longest, and are very much stouter than the other orders. 
The secondaries are usually, but not always, longer and stouter 
than the tertiaries. All are exsert, entire, and beset laterally 
with long pointed granules, which give a serrated appearance ,to 
their upper margins; the central ends of some septa are also 
lobed. ‘The primaries, which rise higher in the calice than the 
remaining septa, are convexly curved superiorly and then descend 
almost abruptly towards the elongate columella. This is formed 
of solid tissue with large nodules or papilli on its surface. It 
varies much in outline for different individuals, and ‘is 
occasionally almost lamellar, though usually broad and spreading. 
Tt is depressed in the calice, but not greatly, and is fused just 
below its nodular surface to the primary, and still lower down to 
the secondary septa; its junction with the latter is, however, 
rarely visible except in worn examples. 
The costz curve inwards at the calice, and are then continued 
by the convexly curved and exsert septa. They are broad and 
prominent, especially at the margin, from which they gradually 
diminish in size to the base. The six primaries are plainly dis- 
tinguishable on the wall, as they are not only slightly stouter than 
the secondaries and tertiaries, but also project above them at the 
margin. The primaries are free right to the base, where they are 
fused with each other, and also with the united secondaries. and: 
At 
