_Genus_--BALANUS.
Fig. 1 _a_, Balanus glandula, scutum, internal; 1 _b_, tergum,
external.
2 _a_, Balanus balanoides; 2 _b_, portion of basal edge of
parietes of a compartment; 2 _c_, tergum; 2 _d_, tergum,
_var._
3 _a_, Balanus cariosus; 3 _b_, portion of basal edge of
parietes of a compartment; 3 _c_, scutum, internal view of;
3 _d_, tergum, internal; 3 _e_, tergum, external view.
4 _a_, Balanus declivis, lateral view, with basal membrane
removed; 4 _b_, rostrum (to left hand), two lateral
compartments, and carina; 4 _c_ and 4 _d_, scutum and
tergum, external views.
5 _a_, Balanus Hameri; 5 _b_, scutum, internal view; 5 _c_,
tergum, external view.
6 _a_, Balanus amaryllis; 6 _b_, scutum, internal; 6 _c_,
tergum, external view.
7 _a_, Balanus allium; 7 _b_ and 7 _c_, scutum, external and
internal views; 7 _d_, tergum, external.
8 _a_, Balanus cepa, scutum, internal; 8 _b_, scutum,
external; 8 _c_, tergum, external view.