A Monograph on the Sub-class Cirripedia · Charles Darwin
PLATE 11.
_Genera_--TETRACLITA AND ELMINIUS. Fig. 1 _a_, Tetraclita purpurascens, _var._ with surface disintegrated, and with the sutures united and obliterated. 1 _b_, Tetraclita purpurascens, _var._ well preserved, with the radii developed; 1 _c_ and 1 _d_, _var._ scutum and tergum, internal views. 2 _a_, Tetraclita costata; 2 _b_ and 2 _c_, scutum and tergum. 3 _a_, Tetraclita vitiata; 3 _b_, basal edge of portion of wall; 3 _c_ and 3 _d_, scutum and tergum, internal views of; 3 _e_, tergum, internal view, _var._ 4 _a_, Tetraclita cœrulescens; 4 _b_, scutum and tergum united, external view; 4 _c_ and 4 _d_, scutum and tergum, internal views. 5 _a_, Tetraclita radiata; 5 _b_, scutum and tergum united, external view; 5 _c_ and 5 _d_, scutum and tergum, internal views. 6 _a_, Elminius Kingii; 6 _b_ and 6 _c_, scutum and tergum, internal views of; 6 _d_, tergum, _var._ external view of; 6 _e_, tergum, another _var._ internal view of.
Text from Project Gutenberg, public domain in the United States.