calcanea

The demon was the first to recover, and he too leapt the fence, though not quite as gracefully as his predecessors, for he placed one hand on a post and swung over rather than merely relying on his gastrovenia and tendo calcanea.

An East Wind Coming Cover, Arthur Byron 1979

Possesses the general characteristics of _Rhinolophus_, but the tail and calcanea wanting entirely; the intercrural membrane acutely emarginate to the depth of a line even with the knees; ears large, broad and rounded; the summit of the facial membranes rising abruptly, obtusely bifid, bent forward; fur long, delicately fine.

Natural History of the Mammalia of India and Ceylon Robert Armitage Sterndale 1870