PROF. J. S. HUXLEY and Miss Tazelaar find (NATURE June 15, p. 910) that the appendages behind the enlarged male chela in Inachus and Palæmon carcinus show a slight acceleration of growth, while those anterior to it show a slight retardation. They express this as “an influence on the growth gradient by the axial relations of the whole animal”. I presume that this is merely a way of expressing a purely empirical correlation, and therefore I do not understand what meant by suggestions bearing on the mechanism of this influence. What is the mechanism of the influence which produces the original heterogonic growth centre near the tip of the large chela?
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CUNNINGHAM, J. Heterogonic Growth in the Appendages of Crustacea. Nature 124, 14 (1929). https://doi.org/10.1038/124014b0
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