Four ciliated furrows formed by juncture of the oral lobes and body bear rows of small tentacles. Food organisms caught in the current produced by the cilia in the furrows are whirled about until entangled by a tentacle. The tentacle contracts, carrying the food into the labial trough, whence it is drawn off and enters the mouth. Since tentacles will not seize dirt or other foreign bodies, a large amount of selection occurs during feeding. Elimination of undigested materials takes place chiefly through the mouth, but small particles may enter the food canals and be voided at the anus. An examination of young stages from 2 to 8 mm. high shows that food organisms are captured solely by the large pair of tentacles characteristic of the Cydippidae and Pleurobrachia stages of the animal. These tentacles disappear when the ciliated furrows and minute tentacles of the older stages of the ctenophore are developed.