E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Missing Link (The).
According to Darwin, the higher animals are developed from the lower ones. The lowest form of animal life is protoplasm, which develops into ambæ (cell life), and thence, successively, into synambæ, gastrula, hydra, medusa, worms, hematega, ascidians, fish, amphibians, birds and reptiles, monotremata, marsupials, placental mammals, lemuridæ, monkeys [missing link], man.