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

by Charles Darwin

[Plate XXII., figure 11.]

[Plate XXII., figure 12.]

[Plate XXII., figure 13.]

[Plate XXII., figure 14.]