Abstract
Two new species of anomuran crustaceans, Gastroptychus chacei (family Chirostylidae) and Munida sentai (family Galatheidae), are described from specimens taken in the Andaman Sea off southern Thailand. Three galatheids collected from the Andaman Sea off southern Thailand in 267283 m by the TV Nagasaki-maru were made available by Dr. Tetsushi Senta of Nagasaki University. They proved to represent two new species. Gastroptychus chacei, a chirostylid, is unique among the previously known members of the genus, in some respects indicating an affinity with Uroptychus. Munida sentai is one of the rare galatheids having few spines on the branchial margin of the carapace. The type material will be deposited in the National Museum of Natural History, Smithsonian Institution, Washington, D.C.
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