5. _Genus_--CONCHODERMA, _Olfers_. (Darwin, 'Lepadidæ,' p. 136.)
Valvæ 2 ad 5, minutæ, inter se remotæ; scuta bi- aut tri-lobata,
umbonibus in medio marginis occludentis positis; carina arcuata,
terminis utrinque pæne similibus.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · 第 210 / 417 题