14 SEVENTEENTH REPORT. 



The Origin of the Anthophyta. (With Lantern.) Ernst A. Bessey. 

 The Botanical Garden at Buitenzorg. (With Lantern.) H. A. Gleason. 

 Some Conclusions Drawn from the Permanent Quadrats at Douglas Lake. 



(With Lantern). Ada K. Dietz. 

 Growing Imported Cacti in JNIichigan. Wm. E. Praeger. 

 The Question as to the Toxicity of Distilled Water. R. P. Hibbard. 

 Does the Movement of Air Affect the Growth of Plants. Alma Hollinger. 

 Geotropic Sensitiveness in Seedlings. Mary E. Elder. 

 Twining of plants in the Dark. F. C. Newcombe. 

 Delayed Germination in Seeds. Wright A. Gardner. 

 Preservation of Vitality in Some Tree Seeds. C. C. Delavan. 

 Dr. Real's Seed Vitality Experiments. H. T. Darlington. 

 The Prairies of Kalamazoo County. LeRoy H. Harvey. 



(Full report to be published, when completed.) 

 Contribution to the Botany of Michigan No. 12, Michigan Novelties. O. E. 



Farwell. 

 The Holdfasts of Marine Algae. H. Hus. 

 Capsella Hybrids. H. Hus. 

 Papaver Hybrids. H. Hus. 



Reproductive Morphology of Ginkgo. W. W. Tapper. 

 The Effect of Fungicides on an Apple Rot Due to Longyear's Alternaria. 



R. W. Gross and S. P. Doolittle. 

 Sterilization of Pop Corn. Reed O. Brigham. 



SECTION OF ZOOLO(JY 



B. G. Smith, Chairman 



Room 207, South Wing, University Hall 



Thursday, April 1, 9:00 a. m. and 1:30 p. m. 



The Dragon-flies of the Douglas Lake Region. Arthur T. Evans. 



An Ecological Survey of the Fishes of the Douglas Lake Region, with par- 

 ticular reference to their Mortality. Roy J. Colbert. 



Parthenogenesis and Sex in Anthothrips verbasci. A. Franklin Shull. 



Peculiar Nesting Behaviour of a Robin. Bertram G. Smith. 



Some Observations on the Ants of British Guiana. Frederick M. Gaige. 



Notes on the Mammals and Birds of Whitefish Point, Michigan. Norman A. 

 Wood. 



The University of Michigan — Nevvcomb Expedition to the Davis Mountains, 

 Texas. Crystal Thompson. 



Some Reptiles and Amphibians collected by the University of Michigan — 

 Walker Expedition in British Guiana. Alexander G. Ruthven. 



The Growth of the Ovocytes in Hymenopterous Insects. R. W. Hegner. 



The Cultivation of Soil Amebae for Class Use (with demonstrations). Ethel 

 M. Knisely. 



A New Agamic Distomu in Thamnophis marciana (B. & G.) George R. Larue. 



Two New Species of Ophiotaenia from King Snake, Lampropeltis getulus. 

 George R. Larue. 



A Female Crayfish with a Male Abdominal Appendage. Peter Okkelberg. 



