The present work on Apseudes talpa forms the second and concluding part of an investigation undertaken in an attempt to discover from feeding mechanisms the steps by which the higher Peracarida may have been derived from a primitive Mysid-like ancestor. The first part of the work consisted of an account of the feeding mechanism of Diastylis bradyi (Dennell, 1934), but it was felt at that time that a discussion of its significance could usefully be postponed until the completion of the work on Apseudes. It is now possible, in view of the accounts of feeding in Hemimysis (Cannon and Manton, 1927), and in Gnathophausia and Lophogaster (Manton, 1928), to discuss with some measure of completeness the feeding mechanism of the Peracarida.