Tomopterids (Annelida : Polychaeta) from the eastern tropical Pacific Ocean

The distribution and composition of species of the holoplanktonic family To mopteridae an presented. The material was taken from 579 zooplankton sample s collected on 12 cruises made by the international oceanographic Program " EASTROPAC" during five of 2-3-mo periods between January-March 1967 to Janu ary-April 1968. A total of 4110 specimens were identified consisting of onl y one genus and eight species. Tomopteris elegans (61%) and I planktonis (2 5%) were the dominant species during this period. T. euchaeta, and I: dunck eri are reported for the first time from the Pacific Ocean and T. krampi is recorded for the first time in the southeastern region of the Pacific.