DESCRIPTION OF A LIMESTONE OF LOWER MIOCENE AGE. 293 
HETEROSTEGINA MARGARITATA, Schlumberger. 
Plate IX, fig. 11. 
Heterostegina margaritata, Schlumberger, 1902, Samml. 
Geol. Reichs. Mus. Leiden, Ser. 1, Vol. VI, pt. iii, p. 252, 
pl. vii, fig. 4. 
One or two well marked examples of this species are 
found in the limestone sections. They are easily distin- 
guished from H. depressa not only by the pustulate orna- 
ment of the surface, but from the internal structure seen 
in section, in which the cones of non-tubulate shell are 
distinctly marked off from the rest of the test. 
The species probably occurs also in the Middle Miocene 
(Janjukian) of Batesford, as previously remarked by the 
writer.’ 
Schlumberger’s specimens came from Teweh, Borneo, 
and his figured example shows the megalospheric stage. 
Genus CYCLOCLYPEUS, Carpenter. 
CYCLOCLYPEUS CoMMUNIS, Martin. Plate IX, fig. 8. 
Cycloclypeus communis, Martin, 1880, Niederlandische 
Archiv fur Zool., Leyden, Vol. v, p. 191, pl. xiii, figs. 1, 2. 
Fragments of the tests of this generic type are distributed 
throughout the Papuan limestone. No isolated test-frag- 
ments could be seen, however, on the small portion of the 
weathered suriace of the rock examined, so that a definite 
determination of the species was impossible. 
Two species of this genus have already been recorded 
from Miocene Lepidocyclina limestone; one of these is the 
above species from Java (Martin) and Borneo (H. Douvillé), 
the other being C. pustulosus, Chapman, from the New 
Hebrides’ and Batesford near Geelong.° 
* Proc. Roy. Soc. Vict., Vol. xx11, (N.S.), pt. ii, 1910, p. 295. 
? Journ. Linn. Soc. N. S. Wales, Vol. xxx, 1905, p. 271, pl. v, fig. 1; pl. 
vi, fig. 2; pl. vii, fig. 2. 
3 Proc. Roy. Soc. Vict., Vol. xxu1, (N.S.), pt. ii, 1910, p. 295, pl. ii, fig. 6; 
pl. v, fig. 4. 
