Neue Litteratur. 53 



True, R. H. and R. B, Harvey. 1918. The absorption of calcium salts 

 by squash seedlino^s. (Brooklyn bot. Gard. Mem. I. p. 502 — 

 512. 3 f.) 



Weber, P. 1918. Studien über die Ruheperiode der Holzgewächse. II. 

 (Sitzber. Ak. Wiss. Wien. 1. CXXVIl. p. 57—91. 2 F.) 



Wittmack, L. 1918. Das Verfahren beim Treiben der Zierpflanzen. 

 (Sitzber. Ges. natf. Freunde Berlin. 1918. p. 279-289.) 



Wolfoff, M. I. 1918. The influence of ammonium sulfate on the ger- 

 mination and growth of barley in sand and soil cultures kept at 

 different moisture contents and at various osmotic concentrations 

 of the soil Solution. (Soil Sc. V. p. 421-479. 6 f.) 



VII. Palaeontologie. 



Berry, E. W. 1919. Pleistocene plants from Tennessee and Mississippi. 



(Torreya. XIX. p. 8—10.) 

 Berry, E. W. 1918. The fossil higher plants from the [Panama] Canal 



Zone. (Bull. U. S. nation. Mus. 103. p. 15-44. pl. 2—18.) 

 Bertrand, P. 1919. Sur la flore du bassin houiller de Lyon (bassin 



houiller du Bas-Dauphin6). (C. R. Ac. Sc. Paris. CLXVIII. p. 



174-177.) 

 Bölsche, W. 1918. Im Steinkohlenwald. 16. Aufl. (Stuttgart, 1918. S» 



103 pp. ill.) 

 Carpentier, M. A. 1919. Notes paleophytologiques sur le carbo 



nifere du Bassin de la Basse-Loire. (Rev. gen. Bot. XXXI. p 



81-93. 1 pl.) 

 Wieland, G. R. 1918. A study of some American fossil Cycads 



Part VIII. Notes on young floral structures. (Amer. Journ. Sc 



XL VI. p. 645—650. 1 f.) 



VIII. Microscopie, 



Coupin, H. 1919. Sur le montage de quelques preparations micro- 



scopiques. (Rev. gen. Bot. XXXI. p. 109—114.) 

 Harkle, M. S. 1918. Notes on microscopie technique. (Proc. Indiana 



Ac. Sc. 1917 [1918]. p. 115—117.) 



IX. Cryptogamen im Allgememen. 



(Vacat.) 



X. Algae. 



Baudin, L. 1919. Contribution ä l'etude de la repartition verticale 

 du plancton dans le Leman. (Bull. Soc. vaudoise Sc. nat. p. 

 275—316. 7 f.) 



Bracher, R. 1919. Observations on Euglena deses. (Ann. of Bot. 

 XXXIII. p. 93—108. 9 f.) 



Gail, F. W. 1918. Some experiments with Fucus to determine the 

 factors Controlling its vertical distribution. (Publ. PugetSound biol. 

 Stat. II. p. 139-149.) 



Gardner, N. L. 1919. New Pacific coast marine algae. IV. (Univ. Ca- 

 lifornia Publ. Bot. VI. p. 487—496. 1 pl.) 



Honigmann, H. L. 1913/4. Neuere Untersuchungen über Chaetoceras 

 zachariasi Hgm. (Arch. Hydrobiol. u. Planktonk. IX. p. 415—418.) 



Howe, M. A. 1918. Calcareous Algae from Murray Island, Australia 

 and Cocos-Keeling Islands. ^Publ. Carnegie Inst. Washington. 1918. 

 213. p. 291—296. 2 pl.) 



Mc Naught, J. 8. 1918. The algae of Kansas reservoirs. (Trans. Kan- 

 sas Ac. Sc. XXVIII. p. 121—128.) 



