Proceedings of the Ohio Academy of Science 25 



Scientific Sessions. 

 The complete scientific program of the meeting follows: 



Presidential Address. 

 What Has the Future for Geologists? G. D. Hubbard 



Addresses in Joint Session with Ohio College Association 

 and Affiliated Societies. 



(See Page 13). . 



Papers. 



1. Parthenogenesis in the Dandelion. 20 min. (Lantern) Paul B. Sears 



2. Exploration of Tremper Mound. 30 min. (Lantern) W. C. Mills 



3. The Educational Value of Wood Study. 10 min. (Lantern). .A. B. Plowman 



4. Botanizing in Porto Rico. 30 min. (Lantern) Bruce Fink 



5. Parallelism between the Cystid Agelacrinites (fossil) and the Holothurian 



Psolus (recent), with Demonstrations. 15 min Stephen R. Williams 



6. The Axial Rotation of Microorganisms and its Evolutionary Significance. 



10 min L. B. Walton 



7. A New Method for Marking Slides. 3 min Paul B. Sears 



8. Notes on Ohio Tingitidse. 6 min Carl J. Drake 



9. Insect Population of Grasslands. 12 min. (Lantern) Herbert Osborn 



10. Genitalia of the Bedbug, with special reference to a Unique Method of 



Copulation. 7 min. (Lantern) P. B. Wiltberger 



11. The Origin of the Gasserian and Profundus Ganglia in Rana. 5 min. 



Ralph A. Knouff, introduced by F. L. Landacre 



12. The Fusion of the Gasserian and Profundus Ganglia in Plpthodon. 5 min. 



Katherine Okey, introduced by F. L. Landacre 



13. The Origin of the Placodal Ganglia in Squalus. 7 min. 



C. I. Reed, introduced by F. L. Landacre 



14. Concerning Thyroid Glands in Amphibia. 10 min. (Lantern). 



R. A. Budington 



15. Feeding Thymus and Thyroid Extracts. 5 min E. P. Durrant 



16. Notes on Protozoa, (a) A Review of the Arcellidae. (b) Supplement 



to the Euglenoidina. 6 min L. B. Walton 



17. Notes on Birds. 10 min H. A. Albyn 



18. A New Three-Salt Nutrient Solution for Sand and Water Cultures. 



10 min A. G. McCall 



19. An Adjustment of the Sliding Microtome for Cutting Lignified Tissue. 



2 min Forest B. H. Brown 



20. Notes on the Structure and Function of the Green Layer of the Bark of 



Woody Plants. 8 min. (Lantern) Forest B. H. Brown 



21. The Distribution of Fungi in Porto Rico. 10 min Bruce Fink 



22. The Genus Physcia in Ohio. 10 min, 



Martha McGinniss, introduced by Bruce Fink 



23. Decrease of Permeability with Age (Preliminary Note). 5 min. 



H. M. Benedict 



24. Methods of Spore Formation in the Zygnemales. 10 min. . . .E. N. Transeau 



