3 OTHER LAMBDA-BOOTIS STARS WITH A SHELL

High signal-to-noise ratio spectra have been taken to detect a possibl e circumstellar shell around lambda Boo stars. It is more and more ass umed that circumstellar matter can be found around such stars. We have considered the CaII K, H gamma and CaI lambda 4427 lines. Two spectra of lambda Boo stars (HD 16955 and HD 104965) show circumstellar shell features in the K-line. Such features could also be present in the sp ectrum of HD 220061 and we confirm the circumstellar shell recently fo und for 131 Tau by Bohlender and Walker (1994).