Part 1 Revolution among the protozoa, K. Vickerman: revising kingdoms - what are the protozoa these days? revising the systematics of protozoa along evolutionary lines; evolution of the nucleus in protozoa; endosymbiosis and evolution of protozoa; evolution of parasitism. Part 2 The molecular phylogeny of protozoa - solid facts and uncertainties, H. Philippe, A. Adoutte: a short account of the pre-molecular era; from the burst of molecular phylogeny to the genesis of a dogma; pitfalls of molecular phylogeny; have these pitfalls affected the phylogeny of protists? a big bang in eukaryotic evolution?. Part 3 Evolutionary relationships among protist phyla constructed from LSUrRNAs accounting for unequal rates of substitution among sites, N.J. Tourasse, M. Gouy: data and methods; results; discussion. Part 4 Evolutionary relationships of microspore, E.U. Canning: phylogenetic relationships of microsporal relationships of microsporidian genera. Part 5 Phylogenetics of protozoa tubulin with reference to the amitochondriate eukaryotes, T.D. Edlind: amitochondrial protozoa - our eukaryotic roots? protein sequences as phylogenetic markers; tubulin - structure in phylogenetic analysis of tubulins; trees based on nearly complete tubulin sequences; trees based on partial tubulin sequences; current models for early eukaryotic evolution; prospects. Part 6 Enzymes and compartmentation of core energy metabolism of anaerobic protists a special case in eukaryotic evolution? M. Muller: amitochondriate metabolism; taxonomic distribution of amitochondriate protists; putative ancestral features of amitochondriate metabolism; history of individual enzymes; metabolic compartmentation; outlook. Part 7 Molecular phylogeny of trichomonas and naegleria - implications for the relative timing of the mitochondrion endosymbiosis, D.S. Horner et al: The small subunit ribosomal RNA gene tree for deep branching eukaryotes; protein phylogenies for protists; are all early branching eukaryotes primitively amitochondriate? relationships of naegleria and other protists based upon actin sequences; relationships of naegleria and other protists based upon beta-tubulin sequences; the position of trichomonas and naegleria inferred from molecular data - absence of support for the 'percolozoa early' hypothesis. Part 8 Hydrogenosomes and plastid-like organelles in amoeboflagellates, chytrids, and apicomplexan parasites, J.H.P. Hackstein et al: hydrogenosomes; interactions of the hydrogenosome with other organelles or endosymbionts; apicomplexan plastids. Part 9 Molecular systematics of the intestinal amoebae, C.G. Clark et al: methods; results. (Part contents).