60 
The corallum is 4:5 mm. high, 5:25 mm. long, and 4:5 mm. 
broad. 
In Edwards & Haime's description of Leptoeyathus ele- 
gans from the London clay, very thin pali, placed before all 
septa, and a delicate papillary columella are mentioned.* 
Duncan's L. epithecata, which is described as an aberrant 
form of the genus, shows small broken-granular pali 
merging into a central columella, and only the larger septa 
have pali  Pourtales refers a recent coral, L. Stimpsoni, 
to the genus with some doubt, and states that there are dis- 
tinct pali before the secondary septa, while those before the 
other orders are scarcely distinguishable from the columella 
processes. Lindström deals with the same species, but 
queries the genus. He says there are no pali and that the 
papilli of the columella may sometimes be mistaken for pali.1 
He also describes the recent L.? halianthus as having a 
similar papillose columella, which in part simulates pali.| 
Lindstróm's drawing of L.? Stimpsoni has somewhat the ap- 
pearance of L.? convexus. The Australian coral has cer- 
tainly the habit of Leptocyathus, as understood by the au- 
thors last mentioned, and may be provisionally referred to 
that genus. 
Locality, etc.—In the Spring Creek section. Only two ex- 
amples have been found, viz., those mentioned above. Col- 
lected by Mr. A. E. Kitson and myself. 
GENUS DELTOCYATHUS. 
Deltocyathus stellaris, spec. nov. Pl. xxiii., figs. la, b, с. 
The corallum is free, discoid, and resembles in general 
form a plano-convex lens. Its under surface is horizontal, 
with a scarcely perceptible prominence in the centre, and 
without showing a trace of adherence. The coste are in 
six systems with four cycles, which are nearly equally de- 
veloped, and conspicuously radiate on the base. The three 
principal orders commence at the centre, and the fourth 
close to it as coarse, granulated lines, which then gradually 
become broader as well as higher towards the margin. 
Their interspaces similarly increase in width towards the 
edge, which is rendered regularly serrate by the equal pro- 
jections of the coste. 
The calice is circular, almost flat, with a moderately large 
and shallow fossula. The columella 1s distinct, nodular on 
its upper surface, and fascicular beneath. The septa are 
* Brit. Foss. Cor., pp. 21-2, t. ii1., fig. 6. 
t Foss. Corals of Sind., pp. 60-1, pl. iv., figs. 4-7. 
t Deep Sea Corals, p. 12, pl. iii, figs. 1, 2, 3. 
T Actinology of Atl. Ocean, p. 9, pl. i., figs. 5 to 8. 
Op cit pp. 9, 10, pl. i., fia. 9: 
