168 MORPHOLOGY AND TAXONOMY [Bot. Absts., Vol. IV, 



1104. Guegan, Makcel. Quelques remarques sur deux champignons communs. [Re- 

 marks about two common fungi.] Bull. Trimest. Soc. Mycolog. France 34: 110. 1919. — The 

 author says that about 15 years ago Lepiota -procera was found in great quantities in certain 

 grass lands, while today this Lepiota is almost extinct. Cantharellus cibarius according to 

 the author is found in great abundance under fir trees, but such specimens are weak, colorless 

 and without taste, while those found in mixed underwood although not found in large bunches 

 are quite vigorous and highly colored. — Fred C. Werkentkin. 



1105. Gttilliermond, A. Zygosaccharomyces Nadsonii; nouvelle espece de levures a 

 conjugaison heterogamique. [Zygosaccharomyces Nadsonii. a new species of yeast.] Bull. 

 Trimest. Soc. Mycolog. France 34: 111-122. PI. 4-7, fig. 1. 1919. — The author describes a 

 new species of yeast, Zygosaccharmyces Nadsonii, which was isolated from the syrup of bitter 

 oranges. The formation of heterogametes by this species is illustrated by 70 drawings on 

 plate VI. — Fred C. Werkenthin. 



1106. Harder, Edmtjnd Cecil. Iron-depositing bacteria and their geologic relations. 

 U. S. Geol. Surv. Prof. Paper 113. 89 p., 14 fig., 12 pi. (4to). 1919.— The field work on which 

 these studies are based was done largely with the bog-iron deposits of the Cayuna Range, 

 Minn., as well as with the waters of Wisconsin; the laboratory work largely at the Univer- 

 sity of Wisconsin. In addition to the higher filamentous, iron-depositing bacteria, the author 

 has studied the iron-precipitating properties of certain almost universally distributed lower 

 bacteria of soil and water, including coccus and bacillus forms. He concludes that there are 

 three principal groups of iron-depositing bacteria: (1) those that precipitate ferric hydroxide 

 from solutions of ferrous bicarbonate, using the carbon dioxide set free and the available 

 energy of the reaction for their life processes; (2) those that do not require ferrous bicarbonate 

 for their vital processes but that cause the deposition of ferric hydroxide when either inor- 

 ganic or organic iron salts are present; and (3) those that attack iron salts of organic acids, 

 using the organic acid radicle as food and leaving ferric hydroxide, or basic ferric salts that 

 gradually change to ferric hydroxide. [See Bot. Absts. 4, Entry 1210.] — E. W. Olive. 



1107. Havens, L. C. A biologic classification of hemolytic streptococci. Jour. Infect. 

 Diseases 25:315-330. 1919. 



1108. Henderson, William F. Some experiments conducted with pure cultures of bread 

 yeast. Trans. Amer. Microsc. Soc. 38: 221-227. PI. 23-24, 2 tables. 1919.— Pure cultures of 

 yeast were secured by the plate method from "Yeast Foam." Culture experiments showed 

 that plain agar or agar plus a disaccharid served poorly as a culture medium; while agar plus 

 monosaccharids, especially glucose and levulose, encouraged abundant growth. The mor- 

 phology of the yeast cell was found greatly modified when grown to old cultures on solid 

 media. Much elongation of the cell took place at the margin of the colony due to the ex- 

 haustion of food as the yeast progressed radially from the center of the colony. Branching 

 was frequently found among the elongated cells. Yeast grows best under aerobic conditions; 

 but will develop under "limited" anaerobic conditions. A maximum of gas was produced 

 irom glucose. Varying amounts were produced from other sugars. — M. Mulvania. 



1109. Herrmann. [Rev. of : Miehe, H. Die Bakterien und ihre Bedeutungin prachtichen 

 Lehen. (Bacteria and their meaning in practical life.) 82 fig. Leipzig. 1917.] Forst. 

 Rundschau 20: 12-13. 1919. 



• 



1110. Hoerner, G. R. Biologic forms of Puccinia coronata on oats. Phytopath. 9: 309-314. 

 PI. 19-20, 4 fig. 1919.— See Bot. Absts. 4, Entry 1301. 



1111. Hohnel, Franz V. Fragmente zur Mykologie XIX. Mitteilung, Nr. 1001 bis 1030. 

 [Mycological Fragments XIX, 1001-1030.] Sitzungsber. K. Akad. Wiss. Wien (Math. -Nat. 

 Kl.) 126:283-352. Fig. 1-19. 1917. — Chaetostroma pedicillalum Preuss is stated to be iden- 

 tical with Volutella ciliata (A. & S.) Fr. f. minor D. Sacc, and is made the type species of a 



