No. 3, July, 1921] ECOLOGY AND PLANT GEOGRAPHY 259 



1833. GuiLLiERMOND, A. Nouvelles recherches sur I'appareil vacuolaire dans les vege- 

 taux. [New investigations of the vacuolar system of plants.] Compt. Rend. Acad. Sci. Paris 

 171: 1071-1074. 25 fig. 1920. — Using the roots of beans and peas and the radicles of barley 

 to trace the development of the vacuoles, the author concludes that the latter are formed 

 from bodies which resemble mitochondria but are not true mitochondria. — C. H. Farr. 



1834. GuiLLiERMOND, A. Sur revolution du chondriome pendant la formation des grains 

 de pollen de Lilium candidtim. [The transformations of the chondriosome during formation 

 of pollen grains of Lilium candidum.] Compt. Rend. Acad. Sci. Paris 170: 1003-1006. Fig. 

 1-11. 1920.- — Chondriosomes in presynapsis consist of granular mitochondria, rods, and 

 chondrioconts. During synapsis numerous small granules and a few large granules appear. 

 The latter enlarge and become darker during diakinesis. In metaphase and during the homeo- 

 typic division, rods and chondrioconts are present. During microspore formation there 

 are small granules and large plastids that become very distinct in the later stages. — C. H. 

 Farr. 



1835. Herrera, a. L. Sur Pimitation des cellules, des tissus, de la division cellulaire 

 et de la structure du protoplasma avec le fiuorosilicate de calcium. [On the imitation of cells, 

 tissues, cell-division, and the structure of protoplasm with calcium fluorsilicate.] Compt. 

 Rend. Acad. Sci. Paris 170: 1613-1614. 1920. — A confirmation of the results of Gatjtier and 

 Clausmann on the biological importance of fluorine. Structures resembling cells are pro- 

 duced by the dilTusion of KHF2 and CaCU into an alkaline solution of colloidal silica. — C. H. 

 Farr. 



1836. Sharp, L. W. Mitosis in Osmunda. [Rev. of: Digby, L. On the archesporial 

 and meiotic phases of Osmunda. Ann. Botany 33: 135-172. 5 pi. 1919 (see Bot. Absts. 3, 

 Entry 1933).] Bot. Gaz. 69: 88-91. 1920. — This paper is regarded as a very complete state- 

 ment of the Farmer theory of the method of chromosome reduction, but it is felt that the 

 figures fail to prove the theory advocated. — H. C. Cowles. 



1837. Wager, Harold. Presidential address. The significance of sex and nuclear 

 fusions in the fungi. Trans. British Mycol. Soc. 6: 305-317. 1920. — The introduction to 

 this address includes brief references to Thomas Gibbs, Sir Charles Thomas Dyke Acland, 

 Dr. Arthur Eckley Lechmere, Charles Ogilvie Farquharson, and Anthony Wallis, 

 mycologists who died during the year. A historical resume of the development of knowledge 

 concerning sex and nuclear fusions in fungi is given. Normal sexual fusion includes at least 

 2 phenomena, the blending of 2 distinct lines of descent, and rejuvenescence of the repro- 

 ductive cell by means of which it receives a new stimulus to growth and division. In the 

 higher fungi the blending of 2 lines of descent seems to have become superfluous and a simple 

 type of nuclear fusion concerned only with rejuvenescence is taking the place of the more 

 complex process of binary sexual fusion. — W. B. McDougall. 



ECOLOGY AND PLANT GEOGRAPHY 



H, C. Cowles, Editor 

 G. D. Fuller, Assistant Editor 



(See in this issue Entries 1604, 1851, 1858, 1970, 2014, 2027, 2028, 2029, 2036, 2037, 2038, 



2047, 2078, 2079, 2080, 2227, 2230, 2231, 2232) 



