EASTER MEETING.

Information about several papers discussed at the Easter meeting of the British Ecological Society held in London, England from April 3-4, 1951 is presented. Topics include the ecology of Hydropsychideae, or Tricoptera, the localization of Cladocera in lakes and ponds and the relationship between the natural habitat preferences of a particular animal and the choice of alternative ones' in towns. A topic on nature conservation was also discussed.