The Proceedings of the 19th International Diatom Symposium are available at the discounted price of £22 from Sarah Davies (Secretary) Insititute of Geography and Earth Sciences Aberystwyth University Penglais Campus Aberystwyth SY23 3DB E-mail: sjd@aber.ac.uk The 18th and 19th Symposium proceedings can be bought together for £40. A.J. Bramburger, P.B. Hamilton, P.E. Hehanussa & G.D. Haffner. Spatial patterns of planktonic and benthic diatom distribution and assemblage similarity in Lake Matano (Sulawesi Island, Indonesia).  M.A. Harper & P.J. Barrett      A diatom record of glacial to interglacial transition beneath the McMurdo Ice Shelf, Antarctica.  O.V. Kaluzhnaya  Valve morphogenesis in the centric diatom Cyclotella baicalensis  G.K. Khursevich & J.P. Kociolek  Four new Cyclotella species from Pliocene lacustrine deposits in the U.S. A. S. Konno & R.W. Jordan Paralia longispina sp. nov., an extant species from Palau and Haha-jima, western North Pacific.  G. Reid The Gyrosigma taxa (Bacillariophyceae) in Lake Baikal, Siberia, Russia.  N. Soninkhishig, M.B. Edlund & D.B. Czarnecki The type, taxonomy, and distribution of Anomoeoneis fogedii Reimer. N.I. Strelnikova  A history of diatom research in Russia  H. Suzuki, J. Tanaka, T. Nagumo & A.E. Kuzmina Morphological and taxonomical study of Cocconeis baikalensis (Skvortzov & Meyer) Skvortzov.  H. Tanaka, T. Nagumo & F. Akiba  Aulacoseira hachiyaensis sp. nov., a new Early Miocene freshwater fossil diatom from the Hachiya Formation, Japan.  A. Tuji & D.M. Williams  Examination of types in the Fragilaria pectinalis-capitellata species complex.  D.M. Williams & G. Reid Type material of Peronia fibula: morphology, systematics and relationships.  S. Yoshitake, H. Fukshima & E.V. Lepskaya  The diatom flora of some hot springs in Kamchatka, Russia.