62 
the secondary pali, which, like the primary, adjoin tne colu- 
mella. There is a distinct, papillary columella. 
The figured соға ата is from Spring Creek, and its dimen- 
sions are: —Height, 3 mm.; diameter of calice, 6:5 mm. 
Another from the same locality is 4 mm. high, and its calice 
is 7 mm. in diameter. An example from Table Cape is 8.5 
mm., and one from Beaumaris 9 mm. in diameter; both of 
these are reduced in height by wear. The largest example 
is from Forsyth's, Grange Burn, and is 5:5 mm. high, and 
9 mm. in diameter. 
Locality, ete.— Extremely common at Spring Creek and 
Maude; less so at Table Cape, Beaumaris, and the upper 
beds of Muddy Creek. Rare in the Mulgundawa bore, 
near Wellington, South Australia. Its range is, there- 
fore, from Eocene to Miocene. 
The specimens from Spring Creek show no trace of ad- 
herence, and the base is flat: in those from Beaumaris, 
Table Cape, and the Muddy Creek Miocene the base is 
variable, being either flat or convex, and with or without a 
scar of attachment. Тһе base is usually concave in Maude 
examples, and seldom shows any central scar. Though 
somewhat diverse in size, as well as in the outline of the 
base, the fossil forms agree in essential characters. As 
already intimated in this volume, they are closely 
allied to the recent D. Vincentinus, mihi. The latter, how- 
ever, is generally taller and larger, is without tertiary 
рап, and. has a deeper central fossa. Examples of 
the fossil species from Table Cape, Beaumaris, and Muddy 
Creek are apparently nearer the recent one than those from 
Spring Creek and Maude. 
Deltocyathus Verconis, spee. now. Pl. xxiv., figs. 2a, b. 
The corallum is minute and discoid in shape. The base is 
flat with a rounded margin. At its centre there is a scar of 
former attachment, large for the size of the coral, and either 
circular or elliptical. There are 48 radiating созбе on the 
base, of equal size, free, and nearly as stout at their central 
ends as at the margin. They do not arise from the centre 
of the base, but only from the borders of the scar of ad- 
herence; when this is removed by wearing, as is often the 
case, the under surface of the columella and of the inner 
ends of the principal septa are exposed. The surface of the 
coste is crenately granulose, the separate granules being 
large, rounded in the axial line, and bluntly projecting 
transversely. From the basal margin the coste rise verti- 
cally for a short distance, and then, curving round, are con- 
tinued as septa. 
