I. Haeckel and His Opponents

It is true that these remains—the top of the skull, a thigh-bone, and some teeth—were incomplete; and a debate that was most interesting arose about them in the Zoological Congress at Leyden. Out of twelve zoologists, three were of opinion that the remains were those of an ape, three that they were those of a human being, while six defended the view that they belonged to an extinct transition form, between man and ape. Dubois set out in a most lucid manner the relation of this intermediate link between man and ape, on the one hand to the lower races of humanity, on the other to the known anthropoid apes. Virchow declared that the skull and the thigh-bone did not belong together; but that the former came from an ape, the latter from a human being. This assertion was refuted by well-informed palaeontologists, who, on the basis of the conscientious report of the find, expressed themselves as of opinion that not the smallest doubt could exist as to the origin of the bony remains from one and the same individual. Virchow tried to prove that the thigh-bone could only have come from a man, from the presence of a bony outgrowth which could only proceed from an illness that had been cured through careful human nursing. As against that, the palaeontologist Marsh showed that similar bony outgrowths occur also in wild apes. A third assertion of Virchow's, that the deep groove between the upper edge of the eye sockets and the low roof of the skull in Pithecanthropus bore witness to its simian nature, was refuted by the palaeontologist Nehring's showing that the same formation existed in a human skull from Santos in Brazil.