690 SCIENTIFIC RECORD FOR 1883. 



devoted to the discussion by Plowrigbt and others of Jensen's experi- 

 ments on the protection against the potato rot afforded by a deep layei 

 of soil over the potatoes. The cause of the yellows in peaches has been 

 studied by Penhallow in the reports of Haughton Farm, and the con 

 ditions of the soil and the alterations in the peach trees are given in de- 

 tail, but no special fungus is assigned as the cause of the disease. 



We should in this connection mention a few works which treat of 

 fungi which cause disease in man and animals, although they are of 

 medical rather thau of botanical interest. The structure and develop- 

 ment of the Soorpilz, Oidium albicans are treated by Dr. F. A. Kehrer iu 

 a paper published at Heidelberg. The writer states that the spore cap- 

 sules mentioned by Burckhardt are merely conidia, surrounded by epi- 

 thelial cells, but he agrees with Gramitz as to the existence of resting 

 spores. The relations of Aspergillus Jlavus, A. niger, A. fumigatus, and 

 A. glaucus, to Otomycosis aspergillina are discussed iu a paper by Dr. F. 

 Siebenmann, of Brugg. The species are described and figured in three 

 plates of poor quality, and a considerable part of the paper is taken up 

 with an account of the effects of certain reagents on the growth of the 

 species studied. Dr. L. Lichtheim has discovered two new species of 

 Mucor, named by (John M. rhizopodiformis and M. corymbifer, which 

 produce disease when introduced into the blood of rabbits. The writer 

 gives the results of his inoculations, and a differential diagnosis of the 

 Mucormykoses and Aspergillomykos^s. Zopf, in Biol, Centralblatt, de- 

 scribes a new species of Myxomycetes, Haplococcus reticulatus, which is 

 found in the hog. Dr. J. Schrceter gives some statistics of cases of 

 poisoning by eating fungi, which have occurred in Silesia up to 18S0. 

 The number is, however, small, and the determination of the species 

 eaten was only possible iu a few instances. 



Algce. — Relating to species of the United States may be mentioned 

 Notes on New England Algce, No. 2, by F. S. Collins, in the Torrey Bulle- 

 tin, where he reports the discovery of Codiolum longipes Fosbe, Calli- 

 thamnium membranaceum Magnus, and other species not before known 

 our coast. In the same journal Mr. G. W. Perry has a note on large 

 specimens of Arthrocladia villosa, found at Falmouth, Mass. No. 7 of 

 Wolle's Fresh- Water Algce, also in the Bulletin, describes and enumerates 

 a considerable number of species new to the United States, principally 

 Desmids. The Bull, Minnesota Acad. Sci. has a paper by J. C. Arthur 

 on some algae of Minnesota supposed to be poisonous. There is also a 

 Note on Fresh-Water Algce, by Farlow, iu Bot. Gazette, where he records 

 the finding of Nostochopsis lobata in Vermont by Mr. Faxon, and of 

 Sphairoploea annulina in California collected by Mrs, Austin. 



The sixth part of Agardh's Till Alger nes Systematic is a monograph of 

 Ulvacece, in which Agardh includes the Porphyrew of other writers. 

 The work is iu Latin and is illustrated by colored plates. The fourth 

 part of Areschoug's Observationes Phycologicw is devoted to notes on 



