4 Dusors—On Pithecanthropus erectus : 
of the river, the third molar tooth was first found in September; then, the hole 
having been enlarged, the cranium a month later, at about 1 metre distant from 
the former, but in the very same level of that bed. The species of mammals, 
of which remains were found in the same bed, are, for the greater part at least, 
extinct ones, and almost certainly none of them are at present living in Jaya. 
Among these remains we find a great number of the above-mentioned small species 
of Cervus, which certainly is not extant in the Malayan isles. Also many bones of 
Stegodon were found. One or two Bubalus species seem to be identical with 
Siwalik species ; a Boselaphus undoubtedly differs from the known species, living 
and fossil. Further on there were found the extinct genus Leptobos, the genera 
Rhinoceros, Sus, Felis, Hyena, and others; a Garial and a Crocodile, differing 
little from the existing species in India, but which cannot be classed among them. 
Of the animals found in the same strata in other places, the most interesting 
species are a gigantic Pangolin (Manis), three times as large as the existing 
Javanese species, and a Hippopotamus belonging to an extinct Siwalik subgenus. 
Further, a Tapir and an Elephas. 
The work having been brought to an end that year on account of the setting 
in of the rainy season, it was taken up again at the beginning of the dry season 
in May, 1892. A new cutting was now made in the left rocky bank, which 
comprised the still unfinished part of the old excavation. Thereby bones were 
again found in great numbers, especially in the deeper beds; and among these, 
again in the same level of the lapilli bed, which had contained the skull-cap and 
the molar tooth, the left femur was found in August, at a distance of about 
15 metres from the former; and at last, in October, a second molar, at a distance 
of 3 metres at the most from the place where the skull-cap was discovered, and in 
the direction of the place where the femur had been dug out. This tooth I did 
not describe, because I only found it later among a collection of teeth derived 
from the place stated above. 
These explanations of the geological circumstances under which the four 
skeleton remains have been discovered, may suffice to convince anyone that they 
not only all come from the self-same intact, most probably young Pliocene 
stratum, but that they were also found in exactly the same level in this: hence 
they must be exactly of the same age. Their very sharp contours are opposed 
to the assumption that the remains originally belonged to an older bed, 
out of which later they have been washed. From the circumstances just stated it 
must, I think, clearly appear that there can be no reason to doubt their origin 
from rocky strata, because they were exhumed in the bank of a river, nor because 
they were found at some intervals of time. 
It may not be superfluous to state that the femur is in entirely the same 
condition of fossilization as the calvaria, the molar teeth, and all the other bones 
