Central incisors 5 to 8 months Lateral incisors 7 to 10 months First molars 12 to 16 months Canines 15 to 20 months Second molars 20 to 36 months _Permanent Teeth. 威廉K.戴维.智者、化学家和伟大医生的秘密.
The molars also differ much in the two animals in relative size and structure. 查尔斯·达尔文.物种起源.
This is a human character, and is due to lateral movement of the jaw, and hence rubbing down of the tubercles of the molars. 赫伯特·乔治·威尔斯.世界史纲.
The one point in the Piltdown jaw itself against chimpanzee identification is the smooth, flat, worn surface of the molars. 赫伯特·乔治·威尔斯.世界史纲.