PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM issued l^^ivA-sFMi ^y '^s SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM Vol. 105 Washington : 1955 No. 3349 NOTES ON SHRIMPS FROM THE MARSHALL ISLANDS By Fenner a. Chace, Jr. The collections on which the following notes are based were made during biological surveys of the northern Marshall Atolls of Eniwetok, Bikini, Rongelap, and Rongerik in 1946 and 1947, under the sponsor-ship of the U. S. Department of the Navy. Only the decapod shrimps of the families Penaeidae, Sergestidae, Pasiphaeidae, Processidae, Thalassocaridae, and the genera Automate and Aihanas of the Alphei-dae are included here. Pressure of other work has precluded the possibility of completing the study of the remaining shrimps of these collections in a reasonable length of time. It is hoped that Dr. A. H. Banner of the University of Hawaii will be able to work up the remaining aipheid shrimps; and Dr. L. B. Holthuis of the Rijks-museum van Natuurlijke Historic, Leiden, The Netherlands, has agreed to include those of the families Hippolytidae, Rhyncho-cinetidae, Palaemonidae, Gnathophyllidae, and Stenopodidae in a forthcoming report on macrurous Crustacea collected by recent expeditions to several of the Pacific island groups. 1 338099—55-