CENSUS OF THE OLDER TERTIARY FAUNA OF AUSTRALIA. 415 
but in all cases evidence is presented of former attachment. The 
calice is circular, open and very shallow, with a small axial space. 
In adult examples this is occupied for a portion, but not the whole 
of the distance to the base with trabecule, which unite the septal 
ends and form a false columella ; in young specimens these are but 
little developed, the septa almost joining in the centre of the calice. 
The septa are slightly exsert at the margin, denticulated, and 
have an irregular outer surface. There are at least five cycles in 
six systems, some of which are incomplete. The first three orders 
extend to the central fossa, and owing to the primaries and 
Secondaries being equally stout the calice really shews twelve 
main subdivisions. The tertiaries are slightly thinner, and the 
quaternaries bend towards and usually unite with them at no 
great distance from the centre: nearer the wall these again are 
occasionally joined by septa of the highest order. 
The endotheca is variable in quantity, some specimens shewing 
numerous dissepiments, while in others there are scarcely any. 
Epitheca thin and seldom complete, usually existing only as 
transverse irregular folds, between which the cost are very 
prominent ; these are also traceable in some examples across the 
banded epitheca. 
The costae are subequal and correspond to the septa, but only 
the principal orders are at all regularly continuous on the wall, 
the others sometimes breaking off and reappearing, or not, lower 
down. There is generally abundant exotheca between the costz. 
The peculiar latticed appearance of these corals, especially when 
much worn, is due partly to the exotheca, but chiefly to the narrow 
ribbon-like bands of epitheca which cross the cost. 
Dimensions :—Height of type specimen 10, diameter of its calice 
14 millimetres. Height of a taller specimen 15 mm. Diameter 
of calice in a large flatly convex example 18 mm. 
Locality :—Abundant in the Eocene at Table Cape, Tasmania. 
Coll. Tate and Dennant, A much worn coral picked up some 
