—~ 
1894.) Current Literature. Migetaee 
THE sECTION Harpidium of the genus Hypnum was elaborated for 
the Muscologia Gallica by Mr. F. Renauld. These pages have been 
issued as a separate.t M. Renauld’s wide knowledge of these*forms, 
very careful descriptions, and criticab remarks under the more obscure 
species will be of great assistance to students of this very difficult 
group. , 
THE UNCULTIVATED bast fibers of the United States are treated in 
a bulletin (no. 6) issued by the U.S. Department of Agriculture in 
its series of fiber investigations. It has been prepared by C. R. Dodge. 
A score or more of species find place in the list, including the com- 
mon and well known plants: Hibiscus Moscheutos, Abutilon Avi- 
cenne, Asclepias incarnata, Apocynum cannabinum and others. 
IN a preliminary paper on Nucleolen und Centrosomen in the 
Berichte a. deutsch. bot. Gesells. 12: 108-117. p/. 6. 1894,? which has 
been distributed as a separate, Dr. J. E. Humphrey shows that the 
nucleolus can not be regarded as an organ of the cell, since the ex- 
tusion and persistence of nucleolar substance, during nuclear division 
‘Snot normal but exceptional and probably pathological. He thinks. 
the nucleoli inactive globules of fluid or semi-fluid substance. The 
Paranucleolus of Strasburger, a crescentic body found often at one 
Margin of the nucleus, is due to faulty fixation methods. He also 
finds centrospheres in Psilotum and Osmunda. . 
index to authors renders reference very easy. Copies of this catalogu 
may be obtained gratis by addressing the director. 
ae ea RTP AIRS EIT IIE ps8 
Musc, Gall. 2: 
. - 2: 368-395. 2/7. 205-1137. Mr 1894. 
See also Annals of Bot. 8: 373-375. S 1894. 
7 Veh XIX. Noa 30: 
