A Monograph on the Sub-class Cirripedia · Charles Darwin
PLATE 5.
_Genus_--BALANUS. Fig. 1 _a_, Balanus perforatus,--_var._ angustus. 1 _b_, " " " Cranchii. 1 _c_, " " " mirabilis. 1 _d_, " " " fistulosus. 2 _a_, " amphitrite,--_var._ venustus. 2 _b_, " " _var._ cirratus. 2 _c_, " " " pallidus. 2 _d_, " " " Stutchburii. 2 _e_, " " " communis. 2 _f_, " " " niveus. 2 _g_, " " " obscurus. 2 _h_, " " scutum, _var._ communis. 2 _i_, " " " " Stutchburii. 2 _k_, " " tergum, " pallidus. 2 _l_, " " " " communis. 2 _m_, 2 _n_, and 2 _o_," " _var._ Stutchburii. 3 _a_, Balanus pœcilus, scutum, internal view; 3 _b_, tergum, external. 4 _a_, Balanus eburneus, scutum, external view; 4 _b_, tergum, external; 4 _c_, scutum, internal; 4 _d_, tergum (_var._), internal.
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