A Monograph on the Sub-class Cirripedia (Volume 2 of 2) / The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc.

by Charles Darwin

[Plate XII., figure 7 b.]

[Plate XII., figure 7 c.]

George Sowerby.

[ELMINIUS] : [PYRGOMA] .

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Plate XIII.