306 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. (Feb. 9, 
distinet and shallow, and are marked feebly by a herring-bone pattern 
of the pellicular epitheca. The calice is circular in outline, and the 
wall is very thin. The columella is well-developed, and is essen- 
tial and fascicular. The septa are in eight systems; and there are three 
cycles in each system. The marginal ends of the septa correspond 
to the intercostal spaces. The primary septa are the largest, and 
reach the columella; the secondary and tertiary are often wavy, 
and end by an enlargement. The endotheca is moderately developed. 
Height 1 inch. Breadth of calice 3, inch. 
Locality. No. 9, three miles west of the river Gellibrand, South 
Australia. 
31. Antini1a LENS, Duncan. Plate XX. fig. 12. 
Coral in the shape of a cyclolite Fungia; the base is circular in 
outline, nearly flat, the concavity being very slight. The epitheca 
is pellicular and faint. The costs are seen as radiating flat eleva- 
tions, those corresponding to the smallest septa being the smallest. 
The margin of the base presents slightly exsert, equal processes, 
which are the septa. ‘The upper surface of the coral is convex and 
nearly hemispherical, the depression for a small essential columella, 
formed by processes from the base and septal ends, being slight. 
The septa are in six systems of four cycles; the primary and se- 
condary septa are equal, and the tertiary are nearly as large; those 
of the fourth and fifth orders are somewhat less: all are very convex 
superiorly, and less so and nearly straight externally. The laminz 
are thin, and are very strongly marked by sharp ridges, which, 
radiating from the basal part of each septum, are more or less 
parallel, and give at the free margin a laterally dentate appearance. 
This appearance is less marked in the smaller septa. There is often 
a paliform process on the larger septa near the columella; and the 
terminations of the ridges give the dentate character to the free 
margin of the septa. ‘The endotheca is scanty, stout, and inclined. 
Breadth 53, inch. Height =4, inch. 
10 
Locality. Hamilton, Victoria, South Australia. 
V. REMARKS ON THE SPECIES. 
Caryophylha viola is very unlike any European or American spe- 
cies of the genus. It differs equally from the fossil forms. It has 
a greater resemblance, as far as shape is concerned, to the Pleuro- 
cyatht of the German Oligocene than to any other corals; but it is 
evidently a Caryophyllia with a papillary columella and tall pali. 
The formation of the columella separates it from the other species 
of the genus; and it exhibits that aberration of unimportant struc- 
tures which is so frequently observed in Australian Mollusca as well 
as Radiata. Hitherto no Caryophyllie have been found in the coral- 
seas between the east coast of Africa and the west coast of America. 
The species C. viola is therefore a very characteristic fossil of a 
portion of the Cainozoic formation of South Australia. 
The Trochocyathi are very unlike anyother species of the genus in’ 
