The excerpt identifies Homo erectus at Swartkrans in South Africa, Olduvai in Tanzania, east of Lake Turkana in Kenya, Melka Konture, Bodo, and the Omo Valley in Ethiopia. These remains are described as more advanced in evolutionary terms than the hominids discussed earlier. Their chronology extends from roughly 2.5 million years ago at Swartkrans to between 500,000 and 1.5 million years ago at Omo.

The reconstructed skull combines a prominent eyebrow ridge with a receding forehead and large frontal sinuses. The bones of the nose project clearly, postorbital constriction is marked, and the dental arch is short, implying a smaller mandible with a lower vertical attachment. The dental and facial structures are said to bring the specimen close to Homo, particularly to Homo erectus.

The classification was assembled through successive interpretations of South African material. Bones isolated at Swartkrans in 1949 were first attributed to Telanthropus capensis, then reassigned to Homo erectus in 1957. Later examination found that the skull of Australopithecus robustus specimen SK 847 fitted the upper jaw associated with Telanthropus, creating a composite anatomical picture that supported the reassignment while also illustrating the uncertainties of fossil interpretation.

At Olduvai, Hominid 13 is described as having a smaller dental apparatus and lower jaw than Homo habilis, while Hominid 16 had a prominent brow ridge. Although the status of some fossils remained uncertain, the excerpt states that Hominid 13 undoubtedly represented the skull cap of Homo erectus. East Turkana discoveries are presented as especially valuable for observing progressive anatomical tendencies within the species.