. Guide leaflet. o sapiens (modern man) with that of thePithecanthropus-Neanderthal series (e. g\, Sinanthropus, Homo soloensis,the Tabun race of Palestine, etc.). The earliest known fossil primates come from the basal Eoceneformations of Western North America. A skull model of one of theMiddle Eocene primates (Fig. 1, 1) shows an unreduced muzzle andrelatively small brain-case. The first apes, with reduced muzzle andenlarged brain-case, date from the Oligocene (Fig. 1, 2). In the longages of the Miocene and Pliocene epochs (the second half of the Ageof Mammals) there was a great branching out

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. Guide leaflet. o sapiens (modern man) with that of thePithecanthropus-Neanderthal series (e. g\, Sinanthropus, Homo soloensis,the Tabun race of Palestine, etc.). The earliest known fossil primates come from the basal Eoceneformations of Western North America. A skull model of one of theMiddle Eocene primates (Fig. 1, 1) shows an unreduced muzzle andrelatively small brain-case. The first apes, with reduced muzzle andenlarged brain-case, date from the Oligocene (Fig. 1, 2). In the longages of the Miocene and Pliocene epochs (the second half of the Ageof Mammals) there was a great branching out into different lines on thepart of the primitive anthropoid stock: some of these foreshadowedthe modern gorillas and chimpanzees, while others (e. g., Ramapithecus)showed certain prehuman characters in the jaw and molar genus Dryopithecus (Fig. 1, 3) was a primitive anthropoid apefrom the Mio-Pliocene of India and Europe. So far as known it formsan approximate structural ancestor for both apes and

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