This record is an overview entry for biological data collected on Diamantina cruise Dm 4/64. This cruise took place in the Indian Ocean off Western Australia during 20-29 July 1964, under the leadership of T. Cowper. Biological data collected on this cruise include phyllosoma and puerulus (Panulirus longipes cygnus) larvae samples and other panulirids and genera for distribution and growth studies. The remainder of the benthic samples were sorted into phyla and sent to the WA Museum. Sediment samples and bottom photography were also obtained for geological studies. Please note: This metadata record is a preliminary entry derived from information in the cruise report. Individual data types - which may span several cruises - will be indexed separately within this metadata system in due course.