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

by Charles Darwin

[Plate XI., figure 6 d.]

[Plate XI., figure 6 e.]

George Sowerby.

[TETRACLITA] : [ELMINIUS] .

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Plate XII.