Cell Lineage

Plankton Studies. The first article of volume five of the Bulletin of the Il/lizois State Laboratory of NSatural History, recently published,' contains a bibliography of the methods of conducting plankton studies and a useful description of the oblique haul and pumping methods which have been in successful use for some years at the Biological Station at Havana, i1l., in the collection and separation of the minute animals and plants floating free in the water and incapable of materially changing their position by their own efforts. Students of this rather new phase of biology will also find an interesting preliminary report on the plankton of some of the lakes of the Alps and Jura 2 in the Bulletin of the Botanical Laboratory of the University of Geneva for June, 1897. T.