The kinetics of locomotion in the earthworm and the nature of the factors which control the various phases of the ambulatory cycle have been subjects of extensive investigation. Numerous theories have been advanced, but a general survey of the literature suggests that the time has not yet been reached at which the more outstanding observations can be fitted into a relatively precise picture. The observations recorded in this paper are, however, relevant for this purpose.

1

We owe our thanks to Dr R. J. Pumphrey for considerable assistance with this section of the work.

Copyright © 1938 The Company of Biologists Ltd.
1938
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