- Fig. 1 a, Tetraclita porosa, var. communis.
- 1 b,”””rubescens.
- 1 c,”””nigrescens.
- 1 d,”””elegans.
- 1 e,”””communis, young, with radii developed.
- 1 f,”””patellaris.
- 1 g,””basal edge of wall of shell.
- 1 h,””basal edge of wall of shell, var. elegans, showing also the structure of one of the
rudimentary radii or sutures.
- 1 i,””internal view of scutum; 1 k, do. of tergum; 1 l, do. of scutum, var.; 1 m, do. of tergum, var.
- 2 a, Tetraclita serrata; 2 b, portion of external surface of wall, low down, near basis; 2 c and 2 d, scutum and tergum, internal views.
- 3 a, Tetraclita rosea, scutum; 3 b, tergum; 3 c, whole shell; 3 d, basal edge of wall of shell.