They consist (fig. 209) of a basal portion (protopodite of Huxley) bearing two rami.
No blade-like projection is as yet developed on their protopodite.
protopodite, endopodite, exopodite, and epipodite were considered to be the morphological units of the crustacean limb.
The chelæ were measured from the inner angle of the joint of the protopodite to the angle of articulation with the dactylopodite.
The exopodite springs from the basipodite and that segment is closely joined to the coxopodite, producing a protopodite.
The coxopodite does not correspond to the protopodite of higher Crustacea, the basipodite remaining as a separate entity.
The protopodite consists of two segments, the first very short, and the second much longer.
In the adult the endopodite is a mere vestige, while the flat outgrowths from the protopodite have become very large and bear set.
Its basal portion (protopodite) bears on its inner side a powerful hook-like bristle.