Crude extracts of tentacles of two polychaetous annelids completely inhibit growth of Erlich ascites tumor in 60 to 100 percent of treated mice. Dialyzed extracts of one of these annelids, Lanice conchilega, show activity in the retentate after pronase digestion, suggesting that antitumor activity is associated with a nonprotein component of the crude tentacle extract.

A new species of Phreodrilidae from Macquarie Harbour, Tasmania is described. Astacopsidrilus ostiensis sp. nov. is unique in possessing the combination of long, tightly folded atria, modified spermarhecal chaetae and ventral chaetae that are almost simple pointed. These are the first phreodrilids to be recorded from estuarine or intertidal habitats, other than two species collected from beache...

GEOFFREY B. READ & JOÃO MIGUEL DE MATOS NOGUEIRA 1National Institute of Water and Atmospheric Research Limited (NIWA), Private Bag 14 901, Kilbirnie, Wellington, New Zealand 2Laboratório de Poliquetologia (LaPol), Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, n. 101, 05508–090, São Paulo, SP, Brazil 3Corresponding author: E-mail: Geoff...