摘要
从1951年开始，我们先后在江苏、浙江、广东、广西、湖南、湖北以及内蒙和东北等地区，调查了淡水鱼类的寄生虫区系，特别是饲养鱼类，在收集的标本中，共有锚头鳋十余种。经鉴定后，其中有4种是尚未兄诸文献的新种，和一个新属，分别叙述于后，其余种类将于另文与生活史和生态部分一同发表。
In the present paper four new species and a new genus of the family Lernaeidae are described. The descriptions are as follows: 1. Lernaea quadrinucifera sp. n. (pl. Ⅰ, figs. 1—9) Several mature females were found on the gill arches of the pond fish Ctenopharyngodon ideilus in Kiangsu and Chekiang Provinces (Yangtze watershed). Total length of the mature females ranges from 7.8 to 11.0 mm. The torsion of the body is mostly sinistral 45°—90° degrees, but few are dextral. The antero-dorsal horns are two “T” shaped extensions of the maxillipede segment, but the unique feature is the group of 4 nut like spheres on the ventral surface of the cephalothorax; these spheres are similar in size and in close contact, obscuring the head and first legs. The spheres of the first pair are always practically spherical, they have separate origins, at the sides of the maxillipeds, from the spheres of the silghtly posterior pair, which are sometimes broader than longand have a nose-like projection posterolaterally, or this may arise separately from their base.
