A Monograph on the Sub-class Cirripedia (Volume 2 of 2) / The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc.
Charles Darwin
Страница - 485
Страница - 487
Plate XX.
[Plate XX., figure 1
a
.]
[Plate XX., figure 1
b
.]
