A jaw with teeth and skull fragments as well as pieces of a right arm and both legs were found.
This cranium is more complete than others from Olduvai.
Important discoveries made in the Koobi Fora region of northern Kenya include a controversial skull called .
As in the case of OH 16, this specimen had been broken into many fragments, which could be collected only after extensive sieving of the deposits.
The walls of the nasal opening, however, are slightly everted, and there is at least an indication that the nose stands out in more relief than would be expected in australopiths. The front teeth of , but the premolar and molar crowns—particularly in the lower jaw—are narrower.
The jaw itself may be quite heavily constructed like that of gracile australopiths.
This gives the central region of the face a depressed, or “dished,” appearance, and the upper part of the nasal profile is obscured by the cheek when the specimen is viewed from the side.