Physiologie. — Algae. 10<> 



SaüNDERS, W., Decrease of vitality of grain by age. 

 (Proceedings Twenty-fourth annual meeting Society for Pro- 

 motion of Agricultiiral Science. 1903. p. 60 — 64.) 



From experiments with wheat^ barley, pease and flax, the 

 conciusion is reached that the germinating power is not dimi- 

 nished for the second year, slightly lessened for the third, but 

 for the fourth and fifth years reduced to a marked extent. 



Trelease. 



Mazza, Anqelo, La Schimmelmannia oniata Schousb. nel 



Mediterraneo. [Con tavola.] (La Nuova Notarisia. 



Serie XIV. 1903. p. 45—61.) 



Verf. hat im Mai 1902 zwischen S. xMaria la Scala und S. Tecla 

 (Sizilien) eine grosse Menge von Individuen einer sehr schönen 

 Floridee, d. i. Schimmelmannia ornata Seh. gesammelt und giebt einige 

 Bemerkungen über diese Alge, welche zum ersten Mal von P. K. A. 

 Schon sboe bei Tanger (Atlantischer Ocean) gefunden wurde. 

 Im Mittelmeere hat Ardissone Schimmelmannia ornata im Jahre 

 1863 bei Acireale entdeckt und unter dem Namen Carpoblepharis? 

 mediterranea n. sp. in Erbario crittogamico italiano, Ser. I, No. 1026 aus- 

 gegeben. Neulich wurde sie von Sauvageau an den atlantischen 

 Küsten Frankreichs und von Baccarini und Fichera wieder 

 bei Acireale (Sizilien) gesammelt. Bei der Vergleichung der 

 Schousboe' sehen Art mit Schimmelmannia Bollei Mont. und 5. 

 Frauenfeldii Grün, ist A. Mazza geneigt, den atlantischen Ursprung der 

 Schimmelmannia ornata anzunehmen. J. B. de Toni (Modena). 



Nelson, N. P. B.^ Observations upon some aigae 

 which cause „water bloom". (Minnesota Botanical Stu- 

 die s. Vol. IIL p. 51—56. pl. 14. f. 1—3.) 



A history of this kind of algal pollution in Minnesota. The usual 

 forms of blue green algae producing this condition in summer have been 

 found, and it is considered that in several instances it has been almost 

 conclusively proved that their presence in drinking water used by stock 

 has caused fatal results. Moore. 



Powell, Chalmer, Observations on some calcareous 

 pebbles. (Minnesota Botanical Studies. Vol. III. 21.March 

 1903. p. 75—77. pl. 16. f. 8—12.) 



A record of two localites for these pebbles, both in Minne- 

 sota. The genera of algae involved were Schizothrix fasci- 

 ciilata, Calothrix, Scytonema, Nostoc and two species of Cos- 

 marium. A Short account of the history of pebbles formed by 

 algae in the United States is given and a quotation describes 

 their structure. Moore. 



Ram ALLY, Francis, Observations on Egregia Menzlesii. 

 (Minnesota Botanical Studies. Vol. III. 21. March 1903. p 1. 

 —9. pl. 1—4.) 



A general account of the distribution, external morphology 

 and anatomy of this species. Egregia is considered as con- 

 forming to the Alaria type but with each brauch 



