摘要:There has been no anatomical study on the lymphatic system of Japanese monkey. In the present study, four Japanese monkeys ( Macaca fuscata fuscata , 2 males and 2 females) were studied on the lymphatic system injected with the Indian-ink. The jugular, subclavian, bronchomediastinal and lumbar lymphatic trunks were well demonstrated, but the intestinal trunk was not fully revealed in this study. In this study the lymphatic system of Japanese monkeys was compared with those of tree shrews, lemurs, marmosets and rhesus monkeys using the idea of Lymphocentrum (Lc), which was introduced by Baum (1930) and Grau (1943). It has been known that there are 15 Lc in tree shrews, 15 Lc in lemurs, 16 Lc in marmosets, and 16 or 18 Lc in rhesus monkeys. The present study showed 15 Lc including 27 lymph nodes in Japanese monkeys. It seems that the Japanese monkey is rather more primitive than the rhesus monkey in the development of lymphatic system.