Table of Genera.
I. The claws of the legs are simple, without a second hook. If there are several on the same foot they are alike in structure and size.
A. The legs are short and broad, each with at least two claws.
2–4 claws Gen. 1. ECHINISCUS, C. Sch. (Fig. [249]).
7–9 claws Sub-gen. 1a. ECHINISCOIDES, Plate.
B. The legs are long and slender; each bears only one small claw.
Gen. 2. LYDELLA, Doy.
II. The claws of the legs are all or partly two- or three-hooked. Frequently they are of different lengths.
A. There are no processes or palps around the mouth.
I. The muscular sucking pharynx follows closely on the mouth-tube.