oxyrhyncha

Century Dictionary and Cyclopedia

1. A superfamily of brachyurous decapod crustaceans, having usually a triangular cephalothorax with projecting rostrum (whence the name), nine pairs of gills, and the male genital pores on the last pair of thoracic legs; the maioid crabs. The species crawl about, but do not swim, and many of them are known as spider-crabs. Also called Maioidea.

GNU Webster's 1913

1. n. (Zoöl.) The maioid crabs.