36 THE NAUTILUS. 
Parthenogenesis in Paludestrina jenkinsi from brackish water. 
By H. E. Quick, p. 97. 
JOURNAL DE CoNCHYLIOLOGIE, Vol. 64, No. 3, Oct., 1919. 
Monographie illustree des Mollusques Oligoceniques des environs de 
Rennes, par M. Cossmann, pp. 1383-199, pls. 4-7. —C. W. J. 
THIRTY-FIRST YEAR OF THE NAUTILUS. 
The April number completed the thirtieth year of THE 
NavriLus under the present editors. That it has had sufficient 
encouragement and support to live so long may fairly be taken 
to mean that the American conchologists have found it stimu- 
lating and useful. When the quarterly issue was begun the 
editors had anticipated increasing the number of pages and 
illustrations; but for the present THE NavriLus is content to 
hold its own against the rising tide of expense in printing and 
paper, by the cordial help of the conchological fraternity. 
It is your magazine. We trust that in this thirty-first year 
every one interested in mollusks will codperate in making it 
more interesting and a greater stimulus to collecting and study. 
Contributions of articles, illustrations, notes and news items 
both personal and scientific will be needed; and by no means 
least, subscriptions. 
H. A. PInssry, 
C. W. JoHNsON, 
