1140 
river contains small Lepidocyclinae, Globigerina and: Lithothamnium. 
Of a number of rocks, which are specially characterized by the 
occurrence of numerous Globigerinae, the age cannot be established 
with certainty. Since their localities are often the same as those of 
the Lepidocyclina-bearing rocks it may be that some of them are 
of the same age as these rocks and were formed under somewhat 
different circumstances viz. in somewhat deeper water. 
A marly limestone with many Globigerinae comes from the river 
Urbiahua, Tamibasin. 
A greyish green limestone with Globigerinae and a few quartz 
splinters was found at Sentanilake opposite Dondai. 
In the peninsula of Morni, Matterer bay a green marl-lime with 
quartz- and plagioclase splinters and a few Globigerina was found. 
The Ajer Dambé, Demta-bay, produced a grey marl-line rich in 
grey Globigerina. 
Tuffacous lime-sandstones with quartz-, plagioclase-, and serpentine- 
grains and with scarce Globigerina originate from the vicinity of 
the Muris-bay. 
Brown marl-limes with pyrite-granules, Globigerina, Pulvinulina, 
and Rotalidae were found in the Sg. Gauw, South Nimboran-mountains. 
A limestone rich in pyrite with very many Globigerina, Amphi- 
stegina, Operculina, and corals comes from the Sawé-hill, Sermuwai- 
river. The facies of this rock is intermediate between the reeflimes 
and the true Globigerina-rocks. 
A limestone from the river Gemuwai appeared to be almost quite 
a breccia of Globigerina and Pulvinulina. 
Whereas it is possible that of the above Globigerina-rocks some 
already belong to the quaternary transgression, this is far more 
probable for some single limestones which, it is true, do not contain 
characteristic fossils, but whose habitus gives the impression that 
they are true ‘Karang’’-samples, “very young reeflimestones”. They 
are porous limestones from the Muris- and Demta-bay. 
Of four reeflimestones (Sekanto-river, Middle Biririver, Upper 
Biririver and Iwarinriver in the Gautier Mountains the exact age 
cannot be given, but they are certainly of post-cretaceous age. 
It appears from the foregoing that all the limestones described 
belong to the post-cretaceous system, while eocene rocks are only 
very scarce. Two other rather considerably recrystallized limestones 
(from village of Semenaré and from the Cyclop mountains) which 
do not contain recognizable fossils, were the only ones in the col- 
lection which probably were of pretertiary age, though they also 
may be young. 
