The ultrastructures of the forgut and hindgut in copepods Calanus sinicus(Brodsky, 1962) and Calanopia thompsoni (A.Scott, 1909) are observed bylight and electron microscopes.

• 用光学显微镜和透射电子显微镜对植食性的中华哲水蚤(Calanus sinicus Brodsky；1962)和肉食性的汤氏长足水蚤(Calanopia thompsoni A.；scott；1909)的前肠和后肠进行观察。