Inheritance of the Keel in Potamopyrgus Jenkinsi (Smith)


THE keel, when present in the aquatic and parthenogenetic mollusc, Potamopyrgus Jenkinsi (Smith), can exist in many degrees of strength. It may vary from the faintest of lines on the shell to a well-marked spinous keel, this latter being the aculeate variety of Overton.

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  1. 1

    Robson, G. C., Brit, J. Exp. Biol., 3, 149 (1926).

  2. 2

    Boycott, A. E., Proc. Mal. Soc., 18, 230 (1929).

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