The material on which the present report is principally based, was collected by Dr. J. H. STOCK, Zoological Museum of the University, Amsterdam, in Piscadera Bay, Curaçao, in 1958 and 1959, and kindly placed at my disposal some time ago. In the course of my study of this highly interesting material it became necessary to redescribe some of C. B. WILSON’S fragmentarily known species of Bomolochidae. A re-inspection of some of WILSON’S types has been made possible thanks to the generous co-operation of Dr. THOMAS E. BOWMAN, Associate Curator, Divison of Marine Invertebrates, and Dr. ROGER F. CRESSEY, Associate Curator, Division of Crustacea, both of the Smithsonian Institution (United States National Museum), Washington, U.S.A. The bulk of the Piscadera Bay material, including all the types, is now in the collections of the Zoological Museum of the University, Amsterdam; some paratypes and duplicates are preserved in the collections of the Rijksmuseum van Natuurlijke Historie, Raamsteeg, Leiden. All the hosts have been identified by Dr. M. BOESEMAN, Rijksmuseum van Natuurlijke Historie, Leiden.