A Monograph on the Sub-class Cirripedia · Charles Darwin
PLATE 7.
_Genus_--BALANUS. Fig. 1 _a_, Balanus glandula, scutum, internal; 1 _b_, tergum, external. 2 _a_, Balanus balanoides; 2 _b_, portion of basal edge of parietes of a compartment; 2 _c_, tergum; 2 _d_, tergum, _var._ 3 _a_, Balanus cariosus; 3 _b_, portion of basal edge of parietes of a compartment; 3 _c_, scutum, internal view of; 3 _d_, tergum, internal; 3 _e_, tergum, external view. 4 _a_, Balanus declivis, lateral view, with basal membrane removed; 4 _b_, rostrum (to left hand), two lateral compartments, and carina; 4 _c_ and 4 _d_, scutum and tergum, external views. 5 _a_, Balanus Hameri; 5 _b_, scutum, internal view; 5 _c_, tergum, external view. 6 _a_, Balanus amaryllis; 6 _b_, scutum, internal; 6 _c_, tergum, external view. 7 _a_, Balanus allium; 7 _b_ and 7 _c_, scutum, external and internal views; 7 _d_, tergum, external. 8 _a_, Balanus cepa, scutum, internal; 8 _b_, scutum, external; 8 _c_, tergum, external view.
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