This small but remarkable family is undoubtedly very closely related to the Rallidiae, from which, however, it differs in many important respects.
In the Finfoot the toes are furnished with a lobed fringe very similar to that of the Coots; the sternum is more massive, broader posteriorly, with a shallow notch on each side; there is no after-shaft ; the wing is quincubital in our Indian species ; there are no bare tracts on the neck; rectrices eighteen.
The flexor tendons are peculiar and appear to be a modification of the Galline arrangement. The flexor longus hallucis gives off a slip to supply the hallux and is then divided into three, each branch uniting with a similar branch from the flexor perforans digitorum to supply one of the other three toes.
The family contains three genera, of which one only is found in India.