Barnacle

Balanus rostratus Hoek. Tokyo Harbor, Japan.

Balanus hoekianus Pilsbry, scutum of type.

Balanus galeatus.

Balanus flos..

Balanus hoekianus Pilsbry. Profile of scutum of type.

Balanus galeatus.

Balanus flos..

Balanus hoekianus Pilsbry, Scutum of type.

Balanus galeatus. From station 4432.

Balanus flos..

Balanus hoekianus Pilsbry, tergum of type.

Balanus galeatus.

Balanus flos..

Balanus hoekianus Pilsbry, tergum of type.

Balanus galeatus.

Balanus flos..

Balanus hoekianus Pilsbry. Lateral view of the walls of the type.

Balanus galeatus. From station 4432.

Balanus flos..

Balanus hoekianus Pilsbry. Top view of the walls of the type.

Balanus flos..

Balanus. A, external view; s, Scutum; t, tergum.

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.

Different forms of Balanus.