1139 
indicate the occurrence of neogene deposits in litoral facies. The 
material examined did not yield sufficient data to make a subdivision 
into older and younger levels. The rocks comprised in this collection 
are the following: 
Pure, porous limestone, south of Nafri, Humboldt bay. No terri- 
genous material. Contains: Lepidocyclina ef. Munieri Lem. et Douv., 
Globigerina, ? Cycloclypeus, ? Carpenteria and Corals. 
Yellowish-grey, highly crystalline limestones from the Singringreng- 
river, south of the Nimboran mountains. Contains large and small 
Lepidocyclinae, Rotalidae and Lithothamnium. 
Slightly porous limestone from the Sg. Tung, Botbotna moun- 
tains with small Lepidocyclinae, Miogypsina, ? Carpenteria conoidea 
Rutten, Nummulites ef. Cuminghii Carp., Amphistegina, Operculina, 
? Cycloclypeus, Rotalidae, Lithothamnium and corals. From the same 
river a greenish gray reeflimestone, including the same faunula as 
the preceding and besides these fragments of serpentine-grains, 
indicative of the occurrence in the vicinity of a subsoil of basic 
eruptiva. 
Two yellowish grey reeflimestones from the river Ohung, right 
affluent of the river Sermuwai near the village of Sawé, with Lepi- 
doeyelina cf. Munieri Lem. et Douv., Operculina, Amphistegina, ? 
Cyeloelypeus, Nummulites cf. Cuminghii Carp., ? Carpenteria, Globi- 
gerina, Orbulina, Lithothamnium and corals. 
Four limestones from the river Buarim, southwestern affluent of 
the river Sermuwai with Lepidocyclina ef. Munieri Lem. et Douv., 
Miogypsina, ? Carpenteria, Amphistegina, Gypsina cf. inhaerens, ? 
Planorbulina larvata P. a. J., ? Cycloclypeus, Miliola, Globigerina, 
Lithothamnium, Halimeda and corals. 
A greenish calcareous rock from the river Gisé, north of the 
Botbotna-mountains with an abundance of quartzgrains, and few 
plagioclase splinters and serpentine grains. It contains small Lepi- 
doeyelinae, ? Cycloclypeus, Amphistegina, Globigerina and Litho- 
thamnium. 
Different limestone-boulders from conglomerates at the middle 
course of the Biri-river with Lepidocyclina, ? Miogypsina, Hetero- 
stegina, Operculina, Cycloclypeus, Amphistegina, Globigerina, Carpen- 
teria, Miliola, Lithothamnium, Halimeda and corals. One sample 
contains serpentine grains. 
A reeflimestone from the South-river, upper course of the Iware, 
basin of the Biri, contains Cycloclypeus, Lepidocyclina ef. Munieri 
Lem. et Douv., Heterostegina or Spiroclypeus and corals. 
A very finely crystalline reeflimestone from Prauw-bivouac, Biri- 
