300 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Feb. 9; 
septa are in six systems of four cycles: the primary and secondary 
are equal, stout, granular, and enlarged internally, where their ends 
form a rudimentary parietal columella; the other septa are smaller 
and granular. The coste are represented by depressions, and the 
intercostal spaces by rounded elevations, which are marked by chevron 
markings of the epitheca. The septa are continuous with the de- 
pressions between the “ intercostal spaces,’ which may be regarded 
more or less as coste. 
Height of the coral 58; inch. Length of calice 4, inch. Width 
of calice =, inch. 
Localities. Tertiaries of Mount Gambier, South Australia, and 
No. 4, clay beneath ‘“ Coralline beds,” near Cape Otway, Victoria, 
S. Australia. 
12. Frasettum Canpranum, Edw.& H. Plate XX. fig. 1. 
Locality. Murray Tertiaries. No. 9, 3 miles west of the river 
Gellibrand 
13. Puacotrocuus rtoneatus, Duncan. Plate XX. fig. 3. 
The coral is very tall in relation to its breadth, straight, greatly 
compressed, especially inferiorly, finely pedicellate and cuneiform. 
The sides are rounded, and slightly swollen out here and there, and 
form an angle of about 15°—20°, or are sharp and slightly spined ; but 
the spines do not project much beyond the epitheca (in old specimens). 
The anterior and posterior surfaces are flat. The calice is small, 
elliptical, and rounded at the sides; it has slightly exsert septa, 
which are rounded, thin, delicate, unequal, and in six systems of four 
cycles. The fossa is central, shallow, and long; the columella pro- 
jects from the bottom of it as a distinct. straight lamella. The colu- 
mella is stout in the body of the coral, and is thinner at its free 
edge; laterally it is marked by distinct papille, which mark the 
junction of the principal septa; and it is “essential.” The lamelle 
of the septa are delicate, highly granular, and are often wavy at the 
inner margin. The smaller axis of the calice is slightly higher than 
the longer. The coste are faintly marked, or distinct and linear. 
The epitheca is in strong curved folds, often as festoons between 
the coste. 
Height 58, ich. Length of calice ;3, inch. Breadth of calice 
345 inch. 
Localities. Muddy Creek, South Australia, and No. 4, clay beneath 
‘¢Coralline beds,” South Australia. 
14, PLacorrocuus DELTOIDEUS, Duncan. Plate XX. fig. 4. 
The corallum is deltoid, finely pedicellate inferiorly, and com- 
pressed. Superiorly the calice is wide and long. The coste are 
moderately distinct. ‘The epitheca is strong, and presents arched 
ridges, the costes being often chevroned beneath it. The columella 
is long, sharp, thin, and faintly papillate. The septa are not 
exsert, are feebly arched and delicate, granular, and their internal 
