We publish here the second part of our spectroscopic survey at high di
spersion of some known and suspected lambda Bootis stars with a view t
o detecting circumstellar shell features. Eight stars of our sample ex
hibit such features. These stars are fast rotators, a result which is
in line with Hohlweger and Rentzsch-Holm's study (1995). The analysis
of the photometric data has allowed us to confirm the exclusion of a f
ew stars misclassified from the lambda Bootis group.