856 THE AMERICAN NATURALIST. | [Vor. XXXIX. 
The biological significance of leaf-fall is discussed by Wiesner in 
the Berichte der deutschen botanischen Gesellschaft of May 25. 
A review of the identifications of the species described in Blanco's 
Flora de Filipinas, by Merrill, constitutes no. 27 of the publications 
of the Bureau of Government Laboratories, Manila, bearing date of 
April, 1905. 
A paper by Pond on the biological relation of re plants to 
the substratum has been separately issued, recently, from the U. S. 
Fish Commission Report for 1903. 
Duggar's St. Louis address on present problems in plant physiol- 
ogy is printed in Science of June 23. 
A translation, by Lloyd, of Goebel’s St. Louis address on the fun- 
damental problems of present-day plant morphology is published in 
Science of July 14. 
The mutations of Lycopersicum are discussed by White in Zhe 
Popular Science Monthly for July. 
A thesis on fruit and vegetable colors, by LaWall, is published in 
The American Journal of Pharmacy for July. 
An important paper on the fly-galls of Juniperus is published by 
Howard in vol. 1, no. 2, of the ninth series of Annales des Sciences 
Naturelles — Botanique. 
A paper on the morphology and anatomy of the stem of Lycopo- 
dium, by Jones, forms vol. 7, part 2, of the current botanical series 
of Transactions of the Linnean Society of London. 
An extensive paper on the development of the ascus and spore 
formation in Ascomycetes (Contribution no. 61 from the Crypto- 
gamic Laboratory of Harvard University) is published as vol. 32; 
no. 4, of the Proceedings of the Boston Society of Natural History. 
The recently issued 17th volume of Saccardo's Sylloge Fungorum 
forms part 6 of the Supplementum Universale to the original work. 
Postembryonal stages of the Laminariacex are described by 
Setchell in vol. 2, no. 4, of the University of California Publications 
— Botany. 
A short Paper on some Yellowstone diatoms is published by 
Edwards in Nuova Notarisia for July. 
The cell structure of Cyanophycez forms the subject of a paper 
