(Number 1)

E. Fourtanier & J.P. Kociolek - Catalogue of the diatom genera (pp. 1-190). 

(Number 2)

S.A. Cohn, T.P. Spurck & J.D. Pickett-Heaps - High energy irradiation at the leading tip of moving diatoms causes a rapid change of cell direction (pp. 193-206);  E.J. Cox - Studies on the diatom genus Navicula Bory. VIII. Variation in valve morphology in relation to the generic diagnosis based on Navicula tripunctata (O.F. Müller) Bory (pp 207-237);  R.M. Crawford & Y. Likhoshway - The frustule structure of original material of Aulacoseira distans (Ehrenberg) Simonsen (pp. 239-250);  H. Håkansson & V. Chepurnov - A study of variation in valve morphology of the diatom Cyclotella meneghiniana in monoclonal cultures: effect of auxospore formation and different salinity conditions (pp. 251-272);  M.K. Hein & B.M. Winsborough - Brassierea vivens gen. et sp. nov., a new benthic marine diatom from the Bahamas (pp. 273-283); T.E. Laing, R. Pienitz & J.P. Smol - Freshwater diatom assemblages from 23 lakes located near Norilsk, Siberia: a comparison with assemblages from other circumpolar treeline regions (pp. 285-305);  P.K.-S. Lam & A. Li ? Colonization of periphytic algae on artificial substrates in a tropical stream (pp. 307-322);  N.I. Maidana - Thalassiosira patagonica sp. nov. (Thalassiosiraceae, Bacillariophyceae), a new lacustrine centric diatom from Santa Cruz, Argentina.(pp. 323-329);  N.I. Maidana & F.E. Round - Corbellia contorta gen. & sp. nov. (Bacillariophyceae). A new diatom genus from Santa Cruz Province (Argentina) (pp. 331-336);  S. Nagai & I. Imai - The effect of salinity on the size of initial cells during vegetative cell enlargement of Coscinodiscus wailesii (Bacillariophyceae) in culture (pp. 337-342);  F.E. Round, H. Hallsteinsen & E. Paasche - On a previously controversial ”Fragilarioid” diatom now placed in a new genus Nanofrustulum (pp. 343-356);  M.G.M. Souza & P. Compère - New diatom species from the Federal District of Brazil (pp. 357-366);  C. Tolomio, I. Moro, E. Moschin & A. Valandro -  Resultats preliminaires sur les diatomees benthiques de substrats meubles dans la lagune de Venise, Italie (Mars 1994-Janvier 1995) (pp. 367-379);  R.M. Williams, M.B. Edlund & E.F. Stoermer - Taxonomy and morphology of Cymbella stuxbergii from lakes in the Baikal Rift Zone (pp. 381-392).�