Pseudocohnilembus marinus n. sp., a Hymenostome Ciliate from the Virginia Coast.*

SYNOPSIS. Pseudocohnilembus marinus n. sp., a marine ciliate, is described from the Virginia coast. Morphologic studies were made on specimens treated by the Chatton-Lwoff silver impregnation technic. Particular attention is given to the infraciliature of the buccal apparatus and its importance to the systematics of the order Hymenostomatida. The buccal infraciliature of the new species differs from that of all other species of Pseudocohnilembus by the presence of a lateral bar of argentophilic granules at the posterior end of the inner membrane.