280 BOTANICAL GAZETTE. [ October, 
Ir. C. E. OVERTON has watched the conjugation of Spirogyra, and 
finds that the conjugating tubes grow toward each other at the rate of 3u 
per hour, and that twenty four hours elapses between their contact and 
the complete solution of the wall. The passing over of the contents from 
the male cell usually begins about ten or eleven o’clock at night. 
THE NEW GENUS of Palms (Bot. GazerrTe, xi, 314) from the Florida 
gs brought to light by Dr. C.S. Sargent and dedicated to him, is figured 
. “a hs 
what an enormourly prolific writer Dr. Gr s. Beginning with two 
numbers in 1834, one on mineralogy and the other the m. Graminee 
and Cyperaceze (exsiccate), and ending with 1888, no year is unrepre 
editorial work. No less than 355 numbers are credited to him, besides 
the uncounted number of botanical notices and book reviews. 
F Wenr has in the last i im’ iicher fiir wissen- 
: : part of Pringsheim’s Jahrbiicher fii 
schafiliche Botanik (vol. xix, pp. 295-356) PR ate Tb important paper 
‘on vacnoles, His conclusions, in his own words, are as follows: With 
the exception of the doubtful spermatozoids, Cyanophycee, and Bacteria, 
from the protoplasm. Pathologieal «-, ies 
Beas ological vacuole formed by the disorg 
lzation of the nuclei and Sireioens ioe : The paper concludes with a 
Summary of the present knowledge in regard to the vacuoles. 
