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Balanus rostratus Hoek. Tokyo Harbor, Japan.
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Balanus. A, external view; s, Scutum; t, tergum.
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Balanus hoekianus Pilsbry, scutum of type.
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Scalpellum phantasma. Type.
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Scalpellum weltnerianum Pilsbry. Lateral view.
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Scalpellum gonionolum Pilsbry. Lateral view.
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Scalpellum pacificum. Type.
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Balanus flos..
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Heteralepas sp. undet. Ventral view.
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Balanus. B, anatomy; a, antennules; ad, adductor muscle; m, muscles of acuta and terga; o, edge of parapet; ov, ovary; vvi.oviduct; se, sentum; alk, parapet; t, tergum; wo, female aperture. 1903. Balanus.
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Balanus. B, anatomy; a, antennules; ad, adductor muscle; m, muscles of acuta and terga; o, edge of parapet; ov, ovary; vvi.oviduct; se, sentum; alk, parapet; t, tergum; wo, female aperture.
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Balanus hoekianus Pilsbry. Profile of scutum of type.
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Free-swimming stages of Sacculina carcini. A, Nauplius; B, Cypris stage
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Scalpellum weltnerianum Pilsbry. Dorsal view.
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Scalpellum gonionotum Pilsbry. Dorsal view.
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Scalpellum pacificum. Detail of structure at base of carina.
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Balanus flos..
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Heteralepas sp. undet. Lateral view.
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Different forms of Balanus.
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Balanus hoekianus Pilsbry, Scutum of type.
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Scalpellum californicum asseum. Type and a young specimen.
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Balanus galeatus.
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Scalpellum californicum. Rostral plate and adjacent parts.
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Balanus flos..
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Balanus rostratus spertus.