Letter | Published:

Anal and Oral Water Intake by Crustacea

Naturevolume 169pages10511052 (1952) | Download Citation



IN the majority of small and transparent Crustacea, water can be seen with a microscope to be pumped into the alimentary canal by rhythmic antiperistaltic movements of the rectum repeated at intervals of one to a few seconds. This anal drinking is continuous in small species and in the young of larger species; it occurs in intermittent series of gulps in the adults of larger species.

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  1. 1

    Weismann, A., Z. wiss. Zool., 24, 349 (1874).

  2. 2

    Seidentop, W., Arb. ung. biol. Forsch.-Inst., 3, 82 (1930).

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  1. Bedford College, University of London

    • H. MUNRO FOX


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