from the South-Australian Tertiaries. 163 
rounded longitudinal markings beneath the epitheca, but the 
septa are continuous with the furrows between. There are 
therefore no cost, but the intercostal spaces are developed: into 
rounded ridges. 
Height =, inch; length of calice 38; mch, breadth of calice 
<7 Inch. 
Locality.—Muddy Creek, South Australia. 
3. Flabellum Gambierense, n.sp. PI. V. fig. 3. 
The coral is tall, faintly curved, has a long tapering pedicel, 
concave sides, and neither crests nor spines; it is compressed, 
has a strong epitheca, whose folds are arched and finely linear, 
and a calice oval-elliptical in shape. ‘The septa are in six sys- 
tems of four cycles ; the primary and secondary are equal, stout, 
granular, and enlarged internally, where their ends form a rudi- 
mentary parietal columella. The other septa are smaller and 
granular. The coste are but slightly developed. ‘ 
Height of coral =; inch; length of calice ;4; inch; width of 
calice =3, inch. 
‘Locality. Tertiaries of Mount Gambier, South Australia. 
Coll. Geol. Soc. 
4. Flabellum Candeanum, Edwards & Haime. 
This species, now existing in the Chinese seas, is found fossil 
in the Murray Tertiaries of South Australia. Coll. Geol. Soc. 
5. Placotrochus elongatus, n. sp. PI. V. fig. 4. 
The coral is very tall in relation to its breadth, straight, 
greatly compressed, especially inferiorly, finely pedicellate and 
cuneiform. The sides are rounded, slightly swollen out here 
and there, and form an angle of about 15°-20°. The anterior 
and posterior surfaces are flat. The calice is small, elliptical, 
and rounded at the sides; it has slightly exsert septa, which are 
rounded, thin, delicate, unequal, and in six systems of four 
cycles. The fossa is central, deep, and long; the columella is 
seen at the bottom of it as a distinct, straight lamella: the co- 
lumella is stout in the body of the coral, and is thinner at its 
free edge; laterally it is marked by distinct papille, which mark 
the junction of the principal septa, and it is “essential.” The 
lamellz of the septa are delicate, highly granular, and are often 
wavy at the inner margin. The small axis of the calice is slightly 
higher than the longer. The cost are faintly marked, The 
epitheca is in strong curved folds. 
Height =3; inch; length of calice ;3; inch, breadth of calice 
+2; Inch, 
Locality. Muddy Creek, South Australia. 
11* 
