Description: INTRODUCTION\nIn the present paper an attempt is made to collect all records on Tardigrada from the Netherlands and to give a review of the Dutch literature on this group; "second-hand" information of little importance, however, has generally been omitted. Further a list is given of the species present in the small collection of J. C. C. Loman, now property of the Zoologisch Museum, Amsterdam.\n\nREVIEW OF THE LITERATURE\nIn a handbook by J. van der Hoeven (1846, pp. 236 and 666) the Tardigrada are called Colopoda, whilst the name Tardigrada is still used there for a group of mammals; in R. Leuckart\'s supplement to Van der Hoeven\'s book (1856, pp. 143-144) the name Colopoda is altered into Tardigrada.\nVan der Hoeven mentioned some species but he did not indicate any as having been found in the Netherlands. Schlegel (1858) cited the group as Arctisca and introduced the Dutch name "beerdiertjes"; a figure of "Macrobiotus Hufelandii" was given by him on pl. VI fig. 18. Snellen van Vollenhoven (1859, p. 79) introduced another Dutch name: "mosbeertjes", which is still in use at present. According to him "Macrobiotus ursellus M\xc3\xbcll." is found in the Netherlands and occurs in moss growing on roofs; he gave a figure (pl. VI fig. 12) of an exuvium with eggs from which it is clear that his Macrobiotus ursellus actually is a Hypsibius-species, the identity of which, however, is uncertain. Harting (1870, pp. 320, 354-357) mentioned a number of species but apparently his list was compiled from foreign literature and gives no data on Dutch animals. Lubach (1875, pp. 206-207) mentioned the occurrence of the "gewoon mosbeertje" (Macrobiotus ursellus) in the Nether-

Description: INTRODUCTION\nOn 24 September 1962 a number of Tardigrada was obtained from a sample of lichens from the French Alps. The lichens had been collected Figs. 1, 2. Pyxidium tardigradum n. sp. on Hypsibius oberhaeuseri (Doy.). on 27 June 1961 from a rock in the department Haute Savoie and had been preserved in a dry condition for nearly fifteen months. After washing, living specimens of three different species of Tardigrada (Hypsibius oberhaeuseri (Doy\xc3\xa8re), Macrobiotus hufelandii Schultze and Echiniscus spec. were found, together with some eggs of Hypsibius oberhaeuseri and Macrobiotus hufelandii, a small number of Rotatoria and some dead Oribatid Acari. About twenty Protozoa appeared to be attached to one of the specimens of Hypsibius oberhaeuseri (fig. 1). It was thought of interest to study these protozoan symphorionts.\n\nOBSERVATIONS\nAt first the identity of the epizoa could not be determined as they were contracted and in an inactive state. Only nuclei were visible in the cells.\nThe Tardigrade to which these Protozoa were attached, at first was alive; the foremost part of its body was contracted, but the legs moved. The animal was kept in the cavity of a slide partly covered by a cover-glass. The cover-glass was glued to the slide so that it could be placed vertically in a glass-tube with water. This is an easy way to keep such open slides for several days, while the object can be studied regularly, even with oil immersion.\nAfter one day the Tardigrade did not move any more but in one of the Protozoa a pulsating contractile-vacuole could be seen. A day later contractile-vacuoles were visible in three or four specimens and two specimens

Description: An Orobanche growing on Matricaria matricarioides (Less.) Porter was collected near a grain warehouse at Rotterdam harbour in 1935. The specimen was originally identified as O. minor Sm., but upon closer examination it appeared to be O. cernua Loefl. This is the first time that a species of this genus was found as an alien in the Netherlands.