Neue Litteratur. 27 



Sehönfeld, L. 1918. Beizen des Hirsesaatgutes. (Wien, landw. Zt^. 



LXVIII. p. 257.) 

 Stewart, V. B. 1918, Exclusion legislation and fruit tree production. 

 ,, (Phytopathology. VIII. p. 360—364.) 

 Stewart, F. C. 1918. The velvet-stemmed Collybia — a wild winter 



mushroom. (Bull. New York agr. Exp. Stat. 1918. 448. p. 79—98. ill.) 

 Stranäk, F. 1918. Beiträge zur histologischen und physiologischen 



Erforschung der bakteriellen Krankheit der Gefässbundel der 



Kartoffelknollen. (Cbl. Bakt. 2. XL VIII. p. 520-543.) 

 Sylven, N. 1918. 1917 ärs knäckesjuka in norra Västergötland. [Der 



Kieferndrehen im nördlichen Västergötland im Jahre 1917]. (Medd. 



Stat. Skogsförsöksanst. XV. p. 192—204. Schwedisch ill. und p. 



XIX— XXil. deutsch.) 

 Weir, J. R. and E, E. Hubert. 1918. A study of heart-rot in western 



hemlock. (Bull. U. S. Dep. Agr. 1918. 722. 37 pp. ill.) 



XIY. Bacteriologie. 



Baerthlein, K. 1918. Ueber bakterielle Variabilität, insbesondere 

 sogenannte Bakterienmutationen. (Cbl. f. Bakt. 1. LXXXI. p. 369—475.) 



Dufrenoy, J. 1918. Degenerescence graisseuse et dögenerescence 

 essentielle. (C. R. Soc. Biol. Paris. 1918. p. 920—922.) 



Gehring, A. 1918. Zellulose zersetzende Bakterien im Boden. (Prome- 

 theus. XXX. p. 45—47.) 



Martin, J. 1918. Ueber Bakterien-Katalase. IL (Biochem. Zschr. XCII. 

 p. 129—138.) 



Paillot, A. 1918. Coccobacilles nouveaux parasites du hanneton. (C. R. 

 Ac. Sc. Paris. CLXVII. p. 1046—1048.) 



Pringsheim, E. 1918. Ueber Kolonien mit Wachstum in einseitswen- 

 digen Spiralen. (Cbl. Bakt. 2. XLVIII. p. 513-515. 1 A.) 



Sadler, W. 1917. A slime-producing organism from water. (Trans, r. 

 Soc. Canada. 3 XI. p. 63—70.) 



Singer, G. 1917. Die Schädigung der Bakterien durch die Gärung. 

 (Arch. f. Hygiene, LXXXVI. p. 274—307.) 



Xy. Lichenes. 



Wainio, E. A. 1918. Lichenes ab A-Yasuda in Japonia collecti. (Bot. 



Mag. Tokyo. XXXII. p. 154—163.) 

 Williams, R. S. 1918. Some farthest north lichens and mosses of the 



Peary arctic expedition to Grant Land in 1906. (Torreya. XVIII. 



p. 210—211.) 



XVI. Bryophyten. 



Cf. XV. Williams. 



Brotherus, V. F. 1918. Contributions to the bryological flora of the 



Philippines. V. (Philippine Journ. Sc. XIII. C. p. 201—222.) 

 C. H. W. 1918. Sphagnum for surgical work. (Kew Bull. 1918. p. 248.) 

 Evans, A. W. 1918. Hepaticae of St. Croix, St. Jan, St. Thomas and 



Tortola in Britton, Flora of the American Virgin Islands. (Mem. 



Brooklyn bot. Gard. I. p. 104-109.) 

 Hotson, J. W. 1918. Sphagnum as a surgical draining. (Science. N. S. 



XLVIII. p. 203—208.) 



XVn. Pteridophyten. 

 Cf. IV. Whitelegge. 



Hayata, B. 1918. Notes on Archangeopteris and Protomarttea. (Bot 

 Mag. Tokyo. XXXII. p. (237)— (244). Japanese.) 



