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 

 RenneSj par M. Cossmann, pp. 133-199, pis. 4-7. C. W. J. 



THIRTY-FIRST YEAR OF THE NAUTILUS. 



The April number completed the thirtieth year of THE 

 NAUTILUS 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 NauTiLUS 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 cooperate 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. PILSBRY, 

 C. W. JOHNSON. 



