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

by Charles Darwin

[Plate XIX., figure 5 b.]

[Plate XIX., figure 5 c.]

[Plate XIX., figure 5 d.]

George Sowerby.

[CHTHAMALUS] : [CHAMÆSIPHO] : [PACHYLASMA] .