Darwin-Hooker Letters : Letter from C. R. Darwin to J. D. Hooker 27 [June 1854]
Darwin, Charles Robert
Darwin-Hooker Letters
<p style='text-align: justify;'>CD gives his definition of "highness" and "lowness" as "morphological differentiation" from a common embryo or archetype. JDH’s view, with which CD agrees when it can be applied, is the same as Milne-Edwards’, i.e., the physiological division of labour. There is little agreement among zoologists and CD admits his own lack of clarity.</p>