101. Crex (Corn-crake). Bill shorter than the head, thick at the base, compressed, pointed; front toes entirely divided, not margined; second and third primaries longest. Tail pointed, rectrices narrow.
102. Porzana (Spotted and Little Crakes). Bill shorter than head; wings shorter than in Crex; second quill longest; secondaries shorter than primaries by length of hind toe and claw.
103. Rallus (Water-rail). Bill longer than head; wings moderate, third and fourth quills longest.
104. Gallínula (Moor-hen). Bill shorter than the head, stout, straight, compressed; upper mandible expanding at the base and forming a disc on the forehead; toes entirely divided, bordered by a narrow entire membrane, middle toe longer than tarsus.
105. Fúlica (Coot). Bill shorter than the head, straight, robust, convex above, much compressed; upper mandible dilated at the base, and forming a naked patch on the forehead; all the toes united at the base, and bordered by a scalloped membrane.