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

by Charles Darwin

[Plate VIII., figure 8 b.]

[Plate VIII., figure 9.]

[Plate VIII., figure 10 a.]

[Plate VIII., figure 10 b.]