296 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 9, 
stinct grooves, and are of different lengths, those of the higher 
orders joining the others, which reach to the base. All are visibly 
crenulate and faintly granular. 
In form the coral resembles a Sphenotrochus ; the papille on the 
columella resemble those of Brachycyathus; the single row of pali 
and the distinct coste determine it to be one of the Caryophyllie ; 
but the absence of an epitheca is remarkable. It is a very beauti- 
ful form, and, without its calice, would be taken for an Eocene Tur- 
binolian. 
Height ;4; imch. Length of calice 3, inch; width of calice 
2 TyitGl Oe 
» gestbian Violet Creek, near Muddy Creek, South Australia. 
2. TRocHOCYATHUS MERIDIONALIS, n. sp. Plate XIX. fig. 2. 
The corallum is short and hemispheroidal in shape, marked ex- 
ternally by subequal costee and a depression at the base, small and 
circular in outline. The coste are separated by distinct inter- 
costal spaces, are very prominent at the calicular margin, and faintly 
marked with wavy swellings, and their external surface near the 
base has a row of rounded granules. The primary and secondary 
are slightly larger than the tertiary, and the higher orders are smaller 
than the latter. The calice is circular in outline, and shallow. The 
septa are distinct, unequal, distant, and smaller than the coste. They 
are broad externally and exsert, but they soon become narrow, gra- 
nular laterally, and depressed below the calicular margin. There are 
four cycles,in six systems: the primary are the largest, and are con- 
nected with the largest and most prominent cost; the secondary 
are smaller; and the smallest septa, 7. ¢. those of the fourth and fifth 
orders, only unite with the tertiary far inwards. The granules are 
large, and appear to increase in size towards the columella. There 
are pali before all the septa except those of the last cycle; and the 
upper edges of the septa pass upwards and inwards to reach the pali, 
which are small, long, and granular. The tertiary pali are more 
external than the others; and all are united laterally by a spongy 
tissue, so as to form a ring higher than the septa in the body of the 
calice. The ring occupies much space, forms the outside of the 
columella; and within the ring is a deep fossula, at the bottom of 
which the hard and flat centre of the columella is seen. 
Height of corallum 53, inch. Breadth of calice 3, inch. 
Locality No. 7, 23 miles east of the river Gellibrand. 
3. TRocHocyATHUs VicToRIm, n. sp. Plate XIX. fig. 3. 
The corallum is subturbinate and compressed. The base is elongate 
and nearly in the shape of a ridge. The calice is elliptical in shape, 
and shallow. The coste are slightly waved, distinct, subequal, pro- 
minent, rounded, and ornamented on the free surface by circular 
disks with a central boss-like swelling, or by moniliform swellings 
covered with a pellucid structure, which, when worn, represents the 
outside of the disk. They are slightly granular laterally. The 
calicular margin is broad, and the wall is stout. The septa are 
