Two new species of free-living marine nematodes Adoncholaimus chinensis
sp. nov. and Bathylaimus huanghaiensis sp. nov. from the Yellow Sea,
China are described and illustrated. Adoncholaimus chinensis sp. nov.
is characterized by the gubernaculum with a slender apophysis; two
files of seven to eight circumcloacal setae on each subventral side of
body. Bathylaimus huanghaiensis sp. nov. is characterized by a
cylindrical body and smooth cutical. The buccal cavity is relatively
smaller than in other species of the genus Bathylaimus. The anterior
buccal cavity has only one obvious dorsal tooth. The amphids are
subspiral with 1.2 turns, posterior to the base of posterior buccal
cavity. They also have a long three-jointed cephalic seta.