9. _Genus_--PLATYLEPAS, _J. E. Gray_. (Darwin, 'Balanidæ,' p. 424.)
Valvæ testæ 6; unaquæque bilobata et intùs producta, ita ut 6 medias
costas longitudinales efficiant, quæ basin membranaceam extrorsùs
convexam sustinent.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · 第 195 / 417 题