Abstract
The family Ascarididae, as defined by Hartwich (1957) and emended by Osche (1958), comprises species in the generaAscaris, Toxascaris, ParascarisandLagochilascaris, all occurring in terrestrial mammals. Other ascaridoids of terrestrial mammals occur in Crossophoridae and Toxocaridae, the latter includingToxocaraandNeoascaris(see Hartwich, 1957; Sprent, 1957; Osche, 1958).