A Monograph on the Sub-class Cirripedia · Charles Darwin
PLATE 12.
_Genera_--ELMINIUS AND PYRGOMA. Fig. 1 _a_, Elminius modestus; 1 _b_, scutum, internal view; 1 _c_, tergum, internal view; 1 _d_, do., tergum, _var._; 1 _e_, do., tergum, _var._ 2 _a_, Elminius plicatus; 2 _b_, basal edge of portion of wall of shell; 2 _c_ and 2 _d_, scutum and tergum, internal views of; 2 _e_ and 2 _f_, scutum and tergum, internal views of, _var._ 3, Elminius simplex; shell. 4 _a_, Pyrgoma Anglicum; 4 _b_ and 4 _c_, scutum and tergum, internal views. 5 _a_, Pyrgoma cancellatum, shell, seen from above; 5 _b_, shell seen on the under side; 5 _c_ and 5 _d_, scutum and tergum, external views; 5 _e_ and 5 _f_, scutum and tergum, internal views of. 6, Pyrgoma Stokesii, shell imbedded in coral. 7 _a_, Pyrgoma conjugatum, shell, external view of; 7 _b_, scutum and tergum, calcified together, seen from the outside; 7 _c_, do., internal view of.
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