These depressions and swaily places, holding water part of the year, and becoming dry during the malarial season, can be easily dried by means of covered drains, and grassed or sodded over, when they will cease to grow; this vegetation and ague in such localities will disappear. The malarial vegetations begin to develop moderately in July, but do not spring forth abundantly enough to do much damage till about the middle of August, when they in ague localities spring into existence in vast multitudes, and continue to develop in great profusion till frost comes. * * * * * ANALYSIS OF THE MALARIA PLANT (GEMIASMA RUBRA). By Prof Paulus F. Reinsch. Author Algæ of France, 1866; Latest Observations on Algology, 1867; Chemical Investigation of the Connections of the Lias and Jura Formations, 1859; Chemical Investigation of the Viscum Album, 1860; Contributions to Algology and Fungology, 1874-75, vol. i.; New Investigation of the Microscopic Structure of Pit Coal, 1881; Micrographic Photographs of the Structure and Composition of Pit Coal, 1888. Dr. Cutter writes me September 28, 1882: "My dear Professor: By this mail I send you a specimen of the Gemiasma rubra of Salisbury, described in 1862, as found in bogs, mud holes, and marshes of ague districts, in the air suspended at night, in the sputa, blood, and urine, and on the skin of persons suffering with ague. It is regarded as one of the Palmellaceæ. This rubra is found in the more malignant and fatal types of the disease. I have found it in all the habitats described by Dr. Salisbury. Both he and myself would like you to examine and hear what you have to say about it." The substance of clayish soil contains, besides fragments of shells of larger diatoms (Suriella synhedra), shells of Navicula minutissima, Pinnularia viridis. Spores belonging to various cryptogams. 1. Spherical transparent spores with laminated covering and dark nucleus--0.022 millimeter in diameter. 2. Spherical spores with thick covering of granulated surface. 3. Spherical spores with punctulated surface--0.007 millimeter in diameter. 4. Very minute, transparent, bluish-greenish colored spores, with thin covering and finely granulated contents--0.006 millimeter in diameter. 5. Chroococcoid cells with two larger nuclei--0.0031 millimeter in diameter. Sometimes biciliated minute cells are found; without any doubt they are zoospores derived from any algoid or fungoid species. I cannot say whether there exists any genetic connection between these various sorts of spores. It seems to me that probably numbers 1-4 represent resting states of the hyphomycetes. No. 5 represents one and two celled states of chroococcus species belong to Chroococcus minutus.