A new enteric nematode, Camallanus jiyuensis n. sp., is described from the intestine of the shokihaze goby, Tridentiger barbatus (Günther, 1861), collected from the beach of Jiyu Island, Amoy, southeast of China. The new species differs from its congeners mainly in the following combination of characters. The body is rather small in size, with 2 squarish, chitinized thickenings on the anterior border of the buccal capsule. The prongs of the trident are unequal. The nerve ring is near the posterior end of tridents. Cervical papillae are located in the middle of muscular esophagus. The excretory pore is located in the posterior third of muscular esophagus. Twelve pairs of pedunculate caudal papillae are present, of which 7 pairs are preanal and 5 are postanal. Spicules are similar, but subequal in length; the right and the left account for 9.8% and 8.9% of body length, respectively. The vulva does not protrude conspicuously from body surface and is located postequatorially.

A new ascarid of elasmobranchs, Terranova amoyensis sp. n., is described from the intestine of the red stringray, Dasyatis akajei (Müller and Henle), from Taiwan Strait. This is the second report from this genus with a gubernaculum in fish. The new species differs from its congeners mainly in the following combination of characters: the 3 lips are unequal in size and different in shape, i.e., the subventral lips are asymmetric bilaterally and larger than the dorsal lip; the latter lip is bilaterally symmetrical. The ventriculus is spherical, and the cecum is short relative to the esophagus. Spicules are unequal in size, 1.48 mm long for the right spicule and 1.34 mm for the left spicule, or 4.3 and 3.9% of body length, respectively. Nineteen pairs of caudal sessile papillae (excluding phasmids) are present, of which 13 pairs are precloacal; pairs 14 and 15 lie close together on either side of the cloaca, composing ad-cloacal papillae (the pair near the tail end are twins). The remaining 4 pairs of postcloacal papillae form a group near the tail tip (pair 18 also twins and near the phasmids). The gubernaculum is I-shaped. The excretory pore is located on top of a coniform prominence whose location is just behind or between the bases of the 2 subventral lips. The vulva is prominent at one-third of the anterior part of the body; the distance from the vulva opening to the anterior body end is 17.4 mm (13.61–21.41), 26.8% (25.14–28.93%) of the body length.

A new species of philometrid nematode (Nematoda: Philometridae), Philometroides buirnurensis sp. n., is described and illustrated on the basis of female specimens from subcutaneous tissues of the inner surface of the abdominal cavity and the bile duct of cyprinid fishes Leucisuus waleckii (Dybowski), 1869 (type host), Pseudaspius leptocephalus (Pallas), 1776 and Hemiibarbus labeo (Pallas), 1776, from the Buir Nur Lake, a boundary lake between China and Mongolia, on southwest of the Hulun Buir League in the Inner Mongolia Autonomous Region of China. The new species distinctly differs from its congeners mainly in that the posterior half of its body is tapered and conspicuously narrower than the anterior region and that both the head and tail ends are rounded. The cuticular bosses are distributed extensively at both ends but poorly on the middle part of the body. The most peculiar feature of the bosses situated at both ends was their lobe- or rodlike shape and their transverse orientation. Four pairs of submedian outer cephalic papillae and 1 pair of caudal papilla are all relatively large. The new species differs from the most similar congener, Philometroides ganzhouensis Yu, 1998 , in having 4 inner cephalic papillae and in the presence of 2 caudal papillae in mature specimens.

During a helminthological examination of marine fishes from south of the Minnan-Taiwan Bank Fishing Ground, Taiwan Strait, Fujian, China, a new cucullanid nematode, Dichelyne (Cucullanellus) jialaris n. sp., was removed from the intestine of the red seabream, Pagrus major (Temminck & Schlegel, 1834). The new species differs from its congeners mainly in the following characters: body size medium but with relative long spicules of 1.01 mm (0.97–1.06) in length or 20.0% (18.21– 21.8%) of the body length; proximal end of spicules somewhat expanded and distal end rounded; gubernaculum I-shaped, slightly narrow in the middle part, both ends rounded; both anterior and posterior cloaca lips round or oval, prominent and unequal in size. The anterior cloaca lip is at least 2 times larger than the posterior one. There is a conspicuous papilliform structure within the central of anterior and posterior cloacal lip. Vulva of female is not prominent, slightly postequatorial; distance from vulva to anterior end of body is 4.3 (3.0–5.5) mm or 58.0% (54.0–62.0%) of the body length. Considering the result of comparing the structure of so-called unpaired median papilla with the 10 pairs of caudal petiolated papillae in the body of the same individual, the papilliform structures are just a backstop for the cloacal lips, this new species represents the first record of a nematode of the Dichelyne , subgenus Cucullanellus in marine fishes of China Sea.