AT the time of going to press, we have received a further communication from Dr. R. Broom, dated October 5, supplementing his letter under this title which appears on p. 681. He writes: "Since the above letter was written two weeks ago, four more teeth of Australopithecus have been discovered. Two are teeth of a very aged animal with the crowns almost completely worn off. One of these is a lower premolar, and the other a third left upper molar, but these are of little scientific value. The third tooth is a first upper incisor. Unfortunately, part of the crown is broken off and part of the root, but enough is preserved to show most of the structure. It is remarkably human. The width of the crown is about 10 mm. and the whole length of the tooth probably about 32 mm. The fourth tooth is the beautifully preserved crown of a right third upper molar. It agrees closely with the wisdom tooth of the type, but it is slightly more worn and has fewer corrugations. It probably belongs to the same individual as the third right lower molar tooth."