3. _Genus_--TETRACLITA, _Schumacher_. (Darwin, 'Balanidæ,' p. 321.)
Valvæ testæ 4; interdum inter se externè confluentes: parietes poris
perforati, multis plerumque seriebus; basis plana, irregularis,
calcarea aut membranacea.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · 第 189 / 417 题