218 



SCIENCE 



[N. S. Vol. LI. No. 1313 



oorpus striatum of the pigeon: F. T. Rogers, 

 Marquette School of Medicine. 



*PJiotic orientation in the drone-fly, Eristalis 

 tenax: S. O. Mast, Johns Hopkins University. 



*Behavior of a tunicate larva: W. J. Ckoziee, The 

 University of Chicago. 



*Vision in the seventeen-year locust, Cicada sep- 

 tendecim: S. O. Mast, Johns Hopkins Univer- 

 sity. 



'Periodicity in the photic responses of the eugle- 

 noid, SeptooincUs texta, and its bearing on re- 

 version in the sense of orientation : S. O. Mast, 

 Johns Hopkins University. 



'Adaptation to Ught in Euglena variabilis ( ?) and 

 its hearing on reversion in orientation: S. O. 

 Mast, Johns Hopkins University. 



*The maze-iehavior of white rats in the second 

 generation after alcoholic treatment: E. 0. Mac- 

 DowELL and E. M. Vicari, Carnegie Institution 

 of Washington. 



*The relation of modifiaiility of behavior and 

 metabolism in land isopods: C. H. Abbott, 

 Massachusetts Agricultural College. (From the 

 Csborn Zoological Laboratory, Yale University; 

 introduced by Henry Laurens.) 



The rate of ca/rbon dioxide production by pieces of 

 Planaria, in relation to the theory of axial 

 gradients: Geoboe Delwin Allen, University 

 of Minnesota. (Introduced by E. J. Lund.) 



Evolution 



"Irreversible differentiation and orthogenesis: C. 

 JuDSON Heeeick, The University of Chicago. 



"An analysis of the sexual modifications of an ap- 

 pendage in sex-intergrade Daphnia longispina: 

 A. M. Banta and Mart Gover, Station for Ex- 

 perimental Evolution. 



Comparative Anatomy 



'The Urodele vomer: Inez Whipple Wilder, 

 Smith College. 



'The origin, function and fate of the test-vesicles 

 of Amarouoium constellatum : Caswell Grave, 

 Washington University. (Lantern.) 



Respiratory organs of Ucides eaudatus, a West In- 

 dian land crab: C. C. Nutting, University of 

 Iowa. (Lantern.) 



'The homologies and development of the papal or- 

 gan of male spiders: W. M. Barrows, Ohio 

 State University. 



'Morphology of the enteron of the periodical ci- 

 cada, Tibicen septendecim Linn: Charles W. 

 Haegitt and L. M. Hickernell, Syracuse Uni- 

 versity. 



'Sexual dimorphism in Nemertians: W. R. Coe, 



Yale University. 

 The columella auris of the Beptilia: Edward L. 



EiOE, Ohio Wesleyan University. 

 *T7ie spiraoular organ of elasmobranch, ganoid 



and dipnoan fishes: H. W. Noeeis and Sally 



P. Hughes, GrinneU College. 



Invitation Program 



Faunal areas on the Pacific slope of South Amer- 

 ica: C. H. ElGENMANN, University of Indiana. 

 Discussion led by 0. C. Nutting, University of 



Iowa. 



Polyembryony and sex: J. T. Patterson, Texas 

 University. 



Discussion led by S. I. Kornhauser, Denison Uni- 

 versity. 



Physiological life histories of terrestrial animals: 

 V. E. Shelford, Illinois Natural History Sur- 

 vey and the University of Illinois. 

 Discussion led by Thomas Headlee, New Jersey 



Agricultural Experiment Station. 



The worlc of the National Besearoh Counml in re- 

 lation to zoology: C. E. McOlung, chairman, 

 Division of Biology and Agriculture, National 

 Research Council. 



Papers Contributed by The Ecological Society of 

 America 



Hydrogen ion ccmcentration in tlie different stages 

 of pond succession: V. E. Shelford, Illinois Nat- 

 ural History Survey. 



Distribution of life on a river bottom : A. D. How- 

 ard, U. S. Bureau of Fisheries. 



Changes observed in river fauna above Keokuk 

 Bam: A. D. Howard, U. S. Bureau of Fisheries. 



Ecological succession of insects in stored food 

 products: Royal N. Chapman, University of 

 Minnesota. 



Papers following the Zoology Dinner 

 The message of the biologist, vice-presidential ad- 

 dress for Section F: William Patten, Dart- 

 mouth College. 

 Motion pictures of the Barbadoes-Antigua Expedi- 

 tion: C. 0. Nutting, University of Iowa. 



exhibits 



Slides of stained cysts of the intestinal amoebaa 

 and flagellates of man : S. I. Kornhauser, Deni- 

 son University. 



Wire models of paths of oysiter larvse, dero, etc. : 

 A. A. Schaeffer, University of Tennessee. 



