53 
Height of a tall specimen, 48 mm. The type is evidently 
broken, and now measures 35 mm. from its summit to the 
base of the peduncle. The calice of another specimen is ap- 
proximately 35 mm. long and 20 mm. broad. 
Locality.— Abundant in the Spring Creek section. 
I have adopted for this species the manuscript name given 
to it many years ago by ıny late colleague, Professor Tate. 
F. medioplicatum is quite distinct from F. distinctum, 
which occurs abundantly and in good preservation in the same 
beds. The former not only differs from the latter in shape, 
but its calice contains a much smaller number of septa. 
Flabellum microscriptum, spec. mov. РІ. xxii., fig. 1. 
The corallum is compressed, pedicellate, deltoid in shape, 
and slightly keeled at the edges. The epitheca is complete 
and transversely ornamented with delicate, closely set, arch- 
ed, and chevroned lines, which. are occasionally raised in 
growth ridges. Longitudinally the surface is marked by 
very fine straight lines, radiating from the base to the sum- 
mit. These represent the interspaces of the coste. The 
latter are broad, but are only just traceable on the wall. 
The epitheca of the nearest allied species, F. Gambierense, 
has a similar but less delicate ornamentation. 
The calice is narrowly elliptical, and has its minor axis on 
a higher plane than that of the major. The ratio of these 
two axes is in the example figured, the largest collected, as 
100 to 55. The septa are sparsely granular, and in six 
Systems with five cycles. АП are slender at the summit, 
especially the higher orders. Lower down, the principal 
Septa become stout, and unite across the axial space to form 
a strong parietal columella. The remainder vary in length 
according to order, and at the level of the columella are 
still very thin lamelle. The wall is fragile, and the speci- 
mens found are usually much damaged. Out of 17 examples 
in my collection I cannot select a single calice sufficiently 
well preserved to serve for illustration. 
Height of figured corallum, 31mm. Its calice is approxi- 
mately 27 mm. long and 15 mm. broad. 
Locality, etc.—In Wilkinson’s No. 7 locality, two and a 
half miles east of the river Gellibrand, to which it is appa- 
rently restricted. It is accompanied by Trochocyathus me- 
rulionalis, Duncan, T. Vietorie, Duncan, and T. Wilkinsoni 
(see post), whieh so far have only been found in this small 
outcrop. Тһе only other coral discovered in it is the widely 
distributed Flabellum candeamum, Edw. and Haime. In 
addition to the corals a few species of mollusca have been ob- 
tained, several of which are new and peculiar to the section. 
