224 
Diatomacee of Minnesota, Inter-Glacial Peat. Benj. W. Thomas 
(Geol. and Nat. Hist. Surv. Minn. Twentieth Ann. Rept. 
(1891), 290-320). 
The discovery of diatoms in a peat bed, in Blue Earth county, 
Minn., interbedded between glacial clays, is described and about 
100 species are listed. They are all fresh water, and with few 
exceptions, living species. The clays above and below the peat 
are of marine origin. The list is the work of H. L. Smith, and ac- 
companying it are a series of critical notes, which are of great 
value for reference and comparison. A chapter upon methods of 
preparation, by Dr. C. Johnston, is also appended. As Ts 
fungi common in 1892 in Iowa. 1. H. Pammel (Agric. Sci. Jan- 
uary, 1893). 
A long list arranged under the several orders of the most de- 
structive fungi of last year in Central Iowa. 
fungus—A_ Parasitic (Heterosporium asperatum). Geo. Massee 
(Am. Jour. Mic. February, 1893). ; 
This treats of the eterosporium as parasitic upon Similacina 
stellata, accompanied by a full page plate, giving details of the 
structure of the fungus. 
Grasses—Some Diseases of. W.C. Stevens (Kan. Univ. Quart. Jan- 
uary, 1893). 
The grass fungus parasites with regard to their effects are 
grouped: (1) as those destructive to host tissues, Puccinias as 
examples ; (2) those producing abnormal growths, corn smut as il- 
lustration ; (3) destroying the chlorophyll, and (4) those attacking 
the ovaries, as the ergots. Three microphotograph plates illus- 
trate the points made. 
Leguminosengattungen—Zur Kenntniss einige. P. Taubert (Ber. 
Deutsch. Bot. Gesell. x. 6 37-642). 
The genus Garugandra, Griseb, found on a tree of the Argen- 
tine Republic and Bolivia, is referred to Gleditschia and figured. 
Myxomycetes of the Miami Valley. A. P. Morgan (Jour. Cincin- 
nati Soc. Nat. Hist. xv., Nos. 3-4). 
This is the first of a series of papers; characterizes the group; 
lists the species with descriptions under two orders, namely: Li- 
