New records are provided for four species of decapod crustaceans in the eastern Pacific.
Hymenopenaeus nereus(Faxon, 1893) was collected further north and further from the coast than previously known. The distribution of Heterocarpus hostilisFaxon, 1893 is extended from off Panama to off Mexico. Parhippolyte cavernicolaWicksten, 1996, previously known only from the type locality in the Gulf of California, Mexico, has been found in a cave in the Galapagos Islands, Ecuador. Moloha faxoni(Schmitt, 1921) is reported for the first time within the Gulf of California, Mexico.