摘要: The problems involved in the identification of freeliving marine nematodes have stood way ecologists for some time. Although considerable advances are now being made on continent (particularly Kiel Bay and Mediterranean) North America, our lack knowledge British species is still lamentable. In order to rectify this state affairs extent, a study distribution Exe estuary was planned cover as wide spectrum physical chemical conditions possible, ranging from fine muds with low interstitial salinity at head coarse sands high mouth. It hoped that characterization fauna various habitats will form basis further ecological studies other areas. Not surprisingly, large proportion found were new records, science. fourteen latter group discussed paper described elsewhere (Warwick, 1970).