15. _Genus_--OCTOMERIS, _G. B. Sowerby_. (Darwin, 'Balanidæ,' p. 482.)
Valvæ testæ 8; radii marginibus crenatis; basis membranacea.
16. _Genus_--CATOPHRAGMUS, _G. B. Sowerby_. (Darwin, 'Balanidæ,' p.
485.)
Valvæ testæ interiores 8, cum pluribus exterioribus parvarum
supplementalium valvarum verticillis; basis aut membranacea aut
calcarea.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · 第 202 / 417 题