Portunids collected in 1909–1914 by the Fishery Investigation Ship Endeavour, held in the Australian Museum and not previously reported upon, are listed. Additional material collected by the Endeavour and held in the Mortensen collection, Zoologiske Museum, Copenhagen, is also listed. Specimens include a new State record of Nectocarcinus spinifrons Stephenson.
Two new species of Caphyra are described, C. curtipes n.sp. and C. holocarinata n.sp., and a third species is recognized as new, C. carinata nom. nov. Colour notes are given on Charybdis yaldwyni.
Caphyra unidentata is added to the Australian fauna, and new State records are given for Macropipus corrugatus, Caphyra yookadai, Portunus pseudoargentatus, Thalamita crenata, and T. parvidens. The distributions of Charybdis truncate and Portunus orbitosinus on the eastern Australian coast are extended. Portunus gladiator is recorded from Ceylon.