230 BOTANICAL GAZETTE eae 
of a support. The author also refers to several fungi which are not generally 
recognized as lichens, namely, Karschia (Buellia) scabrosa and Lecidea int. 
mescens. —- A, SCHNEIDER. 
IN A review of recent researches on the spermatozoids, Zacharias expresses 
himself thus on the centrosome question : ® 
“ However, on an unprejudiced consideration of the literature involved, one 
may consider it not impossible that, on renewed search, the centrosomes will 
finally be again discovered where, for the present, they have been missed."— 
CoR: B, 
Dr. H. von SCHRENK has been studying the mode of dissemination of 
Usnea barbata, and finds that the wind is the chief agent of transfer. The 
long strands are broken and carried from tree to tree, and owing to hydro- 
scopic movements the transported strands may soon become entangled with 
the new host. A similar study of Ramalina reticulata, by Peirce, was pub- 
lished in the BoTANICAL GAZETTE (25: 404. 1898).—J. M. C. 
*® Bot. Zeit. 577: 6. 1899. 
Trans. Acad. Sci. St. Louis 8: 189-198. 1898. 
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