- Fig. 1 a, Chthamalus stellatus, shell, var. a (communis).
- 1 b,”””” e (depressus).
- 1 c,”””” c (communis).
- 1 d,”””” d (fragilis).
- 1 e,””scutum and tergum, viewed inside, var. c, British.
- 1 f,””scutum and tergum, viewed inside, var. a, Madeira.
- 1 g,””scutum and tergum, viewed inside, var. e, Mediterranean.
- 1 h,””scutum and tergum, viewed inside, var. c and e, St. Jago, Cape de Verde Arch.
- 2, Chthamalus antennatus, shell.
- 3 a, Chthamalus dentatus, shell;
3 b, var. shell, attached to a ship’s bottom;
3 c, tergum, viewed from within.
- 4 a, Chthamalus cirratus, scutum, viewed on inside;
4 b, tergum, viewed on inside.
- 5 a, Chthamalus Hembeli, shell, old specimen.
- 5 b, Chthamalus Hembeli, younger shell;
C, carino-lateral compartment;
a′, ala; d, radius;
E, carina; a′, the two alæ.
- 5 c, Chthamalus Hembeli, scutum, external view of;
5 d, tergum, external view of;
e, two of the crests, to which the tergal depressor muscles are attached, much
enlarged and viewed from vertically beneath, showing the lateral denticuli or sub-crests.
- 6 a, Chthamalus fissus, shell;
6 b, scutum and tergum, separated, internal views of.