首页 / 官方藏书 / A Monograph on the Sub-class Cirripedia (Volume 2 of 2) / The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. / 5. BALANUS NIGRESCENS. Pl. 2, fig. 5 a, 5 b.

5. BALANUS NIGRESCENS. Pl. 2, fig. 5 a, 5 b.

A Monograph on the Sub-class Cirripedia (Volume 2 of 2) / The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · Charles Darwin · 第 22 / 136 章