IOWA ACADEMY OF SCIENCE 



Trophospongium of Crayfish Nerve Cell L. S. Ross 



"Axone Hillock" of Crayfish Nerve Cell L. S. Ross 



A Malignant Tumor of a Chicken Liver, a Demonstration.. 



L. S. Ross 



The White Admiral or Banded Purple Butterfly in Iowa. . . . 



B. 0. Wolden 269 



An Hermaphrodite Crayfish Ivan L. Ressler 



Life History and Habits of the Gold Banded Paper Maker, 



Polistes metricus Say Frank C. Fellett ... 275 



Successful Mink Farming in Iowa B. H. Bail- 

 Notes on the Little Spotted Skunk B. H. Bail- ; 



Notes on Two Strawberry Slugs R. L. Webster 



A Method of Preparing Studies of Trichinetla spiralis Owen.. 



Dayton Stoner and Thesle T. Job 299 



Distributional Notes on Some Iowa Pentatomoidea 



Dayton Stoner 



The Growth of Legumes and Legume Bacteria in Acid ana 



Alkaline Media R. C. Salter 309 



How a Tree Grows Fred Berninghausen 315 



A Section of Upper Sonoran Flora in Northern Oregon 



Morton E. Peck 317 



A Key to the Seeds and Fruits of Some Common Weeds.... 



E. Laurence Falmer .... 335 



Handy Device for Staining Slides E. Laurence Palmer 395 



A Forest Census in Lyon County, Iowa David H. Boot 397 



The Preservation of Fleshy Fungi for Laboratory Use 



Guy West Wilson 



Scleroderma vulgare and its allies Guy West Wilson 411 



Notes on Some Pileate Hydnaceae from Iowa. .Guy West Wilson 415 



Pioneer Plants on a New Levee, II Frank Thone ... 



Notes on the Flora of Sitka, Alaska J. P. Anderson .. 



Notes on a Cultivated Elodea R. B. Wylie 



Insect Pollination of Timber Line Plants in Colorado 



L. A. Kenoyer .... 



Insect Pollination of Frasera stenoscpala L. A. Kenoyer... 



The Sand Flora of Eastern Iowa B. Shimek 



Some Observations on the Weeds of Calif ornia.L. H. Pammel.. 



Some Notes on California Forest Flora L. H. Pammel. . 



A Record of Fungus Diseases ■ 



L. H. Pammel and Charlotte M. King 



Notes on the Pollination of Some Plants Robert L. Post 



Notes on Anatomy of the Leaves of Some of the Conifers 



North America L. W. Durre". 



Late Blight Epidemics in Iowa as Correlated with Climatic 



Conditions A. T. Er-Ain . . 



The Control of the Oat Smut by Formalin Treatment. J. A. Krall . . ' 

 The White Waterlily of Iowa Henry S. Conard . . 



