一、序言 中国鲎(Tachypleus tridentus Leach)属于西太平洋沿岸的暖水性节肢动物,分布在日本南部与我国长江以南沿海各省。每年5—8月,雄鲎抱挟住雌鲎同游至近高潮线附近的沙滩上,由雌鲎掘沙成穴,产卵于穴中,然后由雄鲎排精行体外受精。鲎的受精卵借助阳光照射下沙滩的热量孵化。由于鲎卵外被覆一层不透明的卵壳,在没有特殊处理时,受精卵的卵裂阶段不能观察到,只有当卵壳破裂后,才能见到卵中的幼鲎。鲎的幼体称三叶幼虫(pr- I. Preface Tachypleus tridentus Leach belongs to the warm-water arthropods on the western Pacific coast and is distributed in southern Japan and the coastal provinces south of the Yangtze River in our country. From May to August of each year, the male and female hold the females together to swim on the beach near the high tide line. The females dig into the sand and spawn in the cavities, and then are fertilized in vitro by the males.鲎 fertilized eggs hatch with the heat of the beach under the sun. Ovum covered with a layer of opaque egg shell, in the absence of special treatment, the fertilized egg cleavage stage can not be observed, only when the egg shell rupture, to see the young baby eggs. Tadpole larvae called three-leaf larvae (pr-