(Number 1)

H. Bennion - Surface-sediment diatom assemblages in shallow, artificial, enriched ponds, and implications for reconstructing trophic status (pp. 1-19);  V.A. Chepurnov & A.M. Roschin - Inbreeding influence on sexual reproduction of Achnanthes longipes Ag. (Bacillariophyta) (pp. 21-29);  P. Compère - Gomphonema zairense sp. nov. from the Tshopo Waterfalls (Kisangani, Zaire) (pp. 31-37);  S.R. Cooper - Diatoms in sediment cores from the mesohaline Chesapeake Bay, U.S.A. (pp. 39-89);  E. Cox - Studies on the diatom genus Navicula Bory. VII. The identity and typification of Navicula gregaria Donkin, N. cryptocephala Kütz. and related taxa (pp. 91-111);  S.S. Dixit & J.P. Smol - Diatom evidence of past water quality changes in Adirondack seepage lakes (New York, U.S.A.) (pp. 113-129);  I. Kaczmarska & A. Chan - Navicula pulchriprora, a new species from the coastal waters of Texas, U.S.A (pp. 131-143);  A. McMinn - Comparison of diatom preservation between oxic and anoxic basins in Ellis Fjord, Antarctica (pp. 145-151);  A. Penna, D. Corsi, C. Conrad & M. Magnani - Ubiquitin in Skeletonema costatum (pp. 153-164);  S.R. Stidolph - A morphological and taxonomic study of the complex of diatoms assigned to Caloneis brevis (Gregory) Cleve (pp. 165-177);  M.J. Sullivan & D.J. Wear - A morphological study of the giant diatoms Ardissonea formosa and Synedra bacillaris (pp. 179-190);  K. Teubner - A light microscopical investigation and multivariate statistical analyses of heterovalvar cells of Cyclotella-species (Bacillariophyceae) from lakes of the Berlin-Brandenburg region (pp. 191-205);  D.B. Czarnecki & M.B. Edlund - New combinations for some taxa of Achnanthes (pp. 207-209);  F.E. Round & P.W. Basson - The transference of Auricula cholnokyi Giffen and A. quinquelobata Voigt to Protokeelia (pp. 211-215). Obituary - Dietrich König 1909-1994 (pp. 217-219). 

(Number 2)

L.R. Carvalho, E.J. Cox, S.C. Fritz, S. Juggins, P.A. Sims, F. Gasse & R.W. Battarbee - Standardizing the taxonomy of saline lake Cyclotella spp. (pp. 229-240);  C. Gardner, D. Schulz, R.M. Crawford & K. Wenderoth - Stoschiella hebetata gen. et sp. nov. A diatom from intertidal sand (pp. 241-250);  D.U. Hernández-Becerril - Planktonic diatoms from the Gulf of California and coasts off Baja California: the genera Rhizosolenia, Proboscia, Pseudosolenia, and former Rhizosolenia species (pp. 251-267);  J.P. Kociolek & V.J. Jones - Gomphonema signyensis sp. nov., a freshwater diatom from maritime Antarctica (pp. 269-276);  D.G. Mann & A.J. Stickle - The systematics of Stauroneis (Bacillariophyta) II. The life history of S. phoenicenteron and related species (pp. 277-297);  C. Mayer & A.-M.M. Schmid - Morphology, cell-cycle, and growth-rates of Odontella regia (pp. 299-320);  A.G. Mitlehner - Cylindrospira, a new diatom genus from the palaeogene of Denmark with palaeoecological significance (pp. 321-331);  F.E. Round & P.W. Basson - Protokeelia aculeata nov. sp. from Bahrain (pp. 333-339);  H. Schubert, G. Tremblin, J-M. Robert, S. Sagert & R. Rince - In-vivo fluorescence measurement of photosynthesis of Haslea ostrearia Bory in relation to marennine content (pp. 341-349);  S.J.M. Droop - The Universal Striatometer for photographs and other illustrations (pp. 351-356);  G.R. Hasle - Palmerina nom. nov.: Pseudo-Nitzschia turgiduloides sp. nov. (pp. 357-358).�