chlamydodontidæ

from The Century Dictionary.

• A family of hypotrichous ciliate infusorians, typified by the genus Chlamydodon. They are free-swimming animalcules of ovate form, with convex dorsal and flattened ventral surface, and with elastic or indurated cuticle, more or less completely clothed on the ventral aspect with fine vibratile cilia. The oral aperture opens on the ventral surface, and is succeeded by a tubular pharynx, the walls of which are strengthened by a cylindrical bundle of corneous rods or by a simple horny tube. There is no stylate appendage or fascicle of caudal setæ at the posterior extremity.