Observations on the muscles of normal and moulting crustacea

Abstract
In the course of previous work on mammalian muscle (1) it was found that the muscle of rabbits, when glycogen-free, went into immediate rigor mortis when the circulation stopped. In such cases the rigid muscles were found to have an alkaline reaction. Our attention was called to the following statement of Claude Bernard (2):— “Les muscles des crustacés en général, et notamment de l’écrevisse . . . ne contiennent pas en dehors de la mue de matière glycogène. Aussi, après la mort, entrent-ils en rigidité tout en conservant leur réaction alcaline."

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