Abstract
Although much work has already been published on the bucco-pharyngeal mechanism of a blow-fly larva, a close examination reveals the presence of parts hitherto overlooked or but imperfectly recorded. In this account current nomenclature is retained as far as possible; but where the evidence warrants it new terms are employed based on homology, or on the function of the regions concerned, in an endeavour to arrive at a more useful basis for future reference.

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