“…The classical observations of Merriman (1904, in Allium), Bonnevie (1908, on Ascaris, referring to the drawings only), and Taylor (1922, on Gasteria) all support the quadripartite structure of the somatic chromosome. The senior author's earlier accounts (1932, 1933a, 1933b) of the history of the chromonematic threads through mitosis of Tradescantia have been corroborated by Goodspeed, Uber, and Avery (1935), working on Lilium longiflorum with fixation by liquid air and microincineration. They, in addition, for the first time observed eight threads in somatic metaphase chromosomes.…”