1632 
Palaeontology. — “On a Trilobite Fauna of presumably Devonian 
age in the Dutch East Indies near Kalooë (Tamiang district, 
S. E. Atjeh)” By Dr. W. C. Krein. (Communicated by 
Prof. MoLuNnGRAarr). 
(Communicated in the meeting of January 29, 1916). 
In the south eastern part of Atjeh (Tamiang district, chief settlement 
Kwala Simpang, south of Langsar) the present author discovered at 
a few hours’ distance west of the military encampment Kalooë on 
the Simpang Kiri river, when investigating limestone mountains in 
that locality, a probably devonian fauna, containing among other 
things trilobites, brachiopods, corals and crinoids. 
A local investigation, not extending over the more distant environs, 
led to the following statements. 
When following the Aloer (small river) Kalooé, which a little 
above Kalooé joins the Simpang Kiri river on its western bank, one 
meets after a walk of about an hour and a half a left (western) tributary, 
the Aloer Boenji, the mouth of which is characterised by terraces of 
limestone (travertine). About a hundred metres beyond this tributary 
there is on the same western bank a little used footpath, which at 
first has a south western, further on mainly a western direction and 
which after half an hour’s walk, after a fairly steep rise, passes through 
limestone rocks that seemed to me to belong to the younger, probably 
early tertiary, limestones, which in this region are very frequent. They 
are very well seen e.g. in the Simpang Kiri valley when travelling 
in a sampan (small boat) from Kalooé to the mouth of the Serba 
river. These limestones from which I chipped here and there frag- 
ments did not seem to me to belong to any particular type. 
After this the road descends in a northern direction and on the 
cleavage-planes of one of the rocks lying on this slope I first found 
the pygidium of a trilobite. On searching further a whole fauna then 
came forth from the dispersed blocks, which apparently consisted 
of clayey, reddish brown fine-grained sandstone. 
Eastward of this path, which descends to the north lies a small 
valley, sloping down towards the north east. When examining the 
western bank I could state the following series of strata between 
this rivulet and the highest point of the path, where the rocks of 
limestone occur. 
Reddish grey marly limestones, alternating with grey soft shales, 
occasionally containing fossils ; sometimes harder shales ; total thickness 
about 50 m., position fairly well horizontal. In a cliff of 6 m. height 
the upper portion of these marls is well exposed, in banks of '/, to 
