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This classification was previously suggested by Selenka on other grounds, namely, because of the points in common in the embryonic development of the catarrhine monkeys and of man, and their common distinctiveness as contrasted with the platyrrhines. Haeckel’s Evolutionist Position.
The crowns of the teeth are very carefully drawn in this figure, which is from a plate published by Professor Selenka. It must be noted that the number of tubercles on the true molars may be in exceptional cases one more or one less than that given in this drawing which gives the most usual number.
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