Febbuabt 11, 1910] 



SCIENCE 



235 



Number to Vegetative Characters in the CEnoth- 

 era" (lantern). 



G. H. Shull: "The Inheritance of Sex in 

 Lychnis." 



F. E. Lutz : " Experiments concerning the Re- 

 version of Domesticated Races to the Wild Type." 

 W. J. Spillman : " Mendelian Phenomena Inde- 

 pendent of de Vriesian Hypotheses." 



C. B. Davenport: "Some Consequences of Im- 

 perfect Dominance." 



J. Reighard : " The Biological Meaning of Con- 

 spicuousness in Animals " ( lantern ) . 



T.'H. Montgomery: "Secondary Sexual Char- 

 acters in Spiders." 



C. W. Beebe: "Racket Formation in the Tail 

 Feathers of the Mot-Mot." 



E. M. East: "A Mendelian Interpretation of 

 Variation that is Apparently Continuous." 



W. L. Tower : " Causes and Consequences of 

 Variability in Alternative (Mendelian) Inherit- 

 ance in Experiment and in Evolution" (lantern). 

 W. E. Castle: "On the Nature of Mendelian 

 Factors." 



A. F. Shull : " The Artificial Production of the 

 Parthenogenetic and Sexual Phases in the Life 

 Cycle of Eydatina senta" (read by Professor T. 

 H. Morgan). 



H. S. Jennings : " Experimental Evidence on 

 the Effectiveness of Selection." 



There were interesting discussions of some of 

 the papers; but the program this year, unfortu- 

 nately, proved to be too crowded to permit of the 

 proper time allowance for this very desirable 

 feature. 



DEMONSTBATIOKS 



A new departure was the demonstration of 

 specimens, etc. This list also surely indicates 

 that the naturalists have selected a most prom- 

 ising field of interest to all biologists. 



U. Dahlgren: Gross and microscopic prepara- 

 tions of electric tissues; also lantern slides. 



D. T. MacDougal: Parasitism in plants. 



R. R. Gates: Lantern slides. 



A. M. Lutz: Paintings, lantern slides and micro- 

 scopic preparations of ffinothera. 



F. E. Lutz: Specimens. 



W. J. Spillman: Specimens. 



C. B. Davenport: Illustrations of inheritance of 

 plumage color. 



J. Reighard: Colored photographs and trans- 

 parencies. 



C. W. Beebe: Bird skins. 



E. M. East: Specimens and lantern slides. 



W. L. Tower: General demonstration arranged 

 to illustrate phases of investigation now in prog- 

 ress. (1) photographs; (2) specimens showing 

 results. 



W. E. Castle: Specimens. 



H. S. Jennings: Diverse genotypes in Para- 

 moecium. 



COOPEEATION 



The Botanical Society of America left most of 

 Wednesday morning free to the Naturalists, and 

 the American Society of Zoologists adjourned 

 early in the day. Thus good audiences were 

 possible. It seems probable that interest in the 

 society will continue and grow, if the program is, 

 in future, kept closely in touch with modern work 

 of such general importance to all biologists. This 

 was, after all, the essential principle of the society 

 in its early years. 



PUBLICATION OF PAPEBS 



The papers presented before the society will be 

 published in The American Naturalist, in a series, 

 as supplied by the authors. 



The president's address, on " Chance or Purpose 

 in the Evolution of Adaptations," was delivered 

 at the dinner in the Hotel Somerset, on the 

 evening of the same day. This address is pub- 

 lished in the present number of Science. 



NEW MEMBEBS 



The following new members were elected: F. 

 N. Balch, Boston, Mass.; R. S. Breed, Allegheny 

 College; R. Chambers, University of Toronto; H. 

 Colton, University of Pennsylvania; W. W. 

 Ford, Johns Hopkins Medical School; A. J. Gold- 

 farb. New York; H. G. Kribs, University of Penn- 

 sylvania; A. Petrunkevitch, American Museum 

 of Natural History; Q. J. Simpson, Palmer, 111.; 

 F. M. Surface, University of Maine; C. B. Thomp- 

 son, Wellesley College. 



The officers elected for the year 1910 are: 



President — Dr. D. T. MacDougal, Carnegie In- 

 stitution. 



Vice-President and chairman of the Eastern 

 Section — Dr. H. S. Jennings, Johns Hopkins Uni- 

 versity. 



Treasurer — Dr. E. M. East, Bussey Institution, 

 Boston, Mass. 



Secretary — Dr. C. R. Stockard, Cornell Univer- 

 sity Medical School. 



Members of Executive Council — Dr. Raymond 

 Pearl, University of Maine, and Dr. F. Boaa, 

 Columbia University. H. McE. Knowee, 



Secretary for 1909 



