SIXTH ORDINARY MEETING. 35 



The following exchanges were announced : 



1. The American Journal of Science, Vol. 26, No. 156 for December, 1883. 



2. Journal of the Franklin Institute for December, 1883. 



3. The Canada Practitioner, December, 1883. 



4. On the Osteology and Development of Syngnathus Peckianus, (Storer) by 



J. Playfair McMurrich. 



5. Journal of the Royal Dublin Society, Vol. 2, 1858-'59. 



6. Sitzungsberichte and Abhandlangen der Naturwissenschaftlichen Gesell 



schaft " Isis " in Dresden, Januar bis Juni. 



7. Science Vol. 2, (No. 43, November 30, 1883.) 



8. Constitution and By-Laws of the Chicago Historical Society, 1882-83. 



9. Second Annual Report of the United States Geological;Survey for 18S0-'81. 



10. Twelfth Annual Report of the U. S. Geological and Geographical Survey of 



New Territories; a Report of the Progress in the Exploration of 

 Wyoming and Idaho for 1878 by F. C. Hayden ; U. S. Geologist, Parts 

 1 and 2. 



11. Maps and Panoramas to the above. 



12. United States Geological Survey, Monograph 2 ; Territory History of the 



Grand Canon District by Clarence C. Dutton. 



13. Atlas to accompany the same. 



14. Bulletin of the U. S. Geological Survey, No. 1. 



15. Magazine of American History of December, 1883. 



16. The Scientific Transactions of the Royal Dublin Society, Vol. 1, (Series 2), 



Parts 15, 16, 17, 18, 19 for January, February, August and November, 

 1882. 



17. Scientific Proceedings of the Royal Dublin Society, Vol. 3, (N. S.), 



August, 1882, Part 5. 



18. Verhandelingen der K. Akademie Van Wetenschappen, Twee en 



Twintigste Deel. 



19. Verslagen en Mededeelingen der K. Akademie Van Wetenschappen, Af- 



deeling Natuurkunde, Tweede Reeks, 17th Deel, Parts 1, 2, 3. 



20. Jaarboek Van de K. Akademie Van Wetenschappen, Amsterdam, 1881. 



21. Memoirs of the Geological Survey of India, (Palaeontologialndica), Series 



10, Vol. 2, Part 5. 



22. Jahrbuch der K. K. Geologischen Reichsanstalt, 1883, Band 33, Numbers 



1, 2, 3, January to September, 1883. 



23. Oversigt over det Kongelige Danske Videnskabernes Selskabs, Forhand- 



ling og dets Medlemmers Arbejder i Aaret, 1882, No. 3, 1882, and No. 

 1, 1883, Kjobenhavn. 



24. Memoires de la Societe Royale des Antiquaires du Nord, Nouvelle Serie, 



1S82-83, 1884 Copenhague. 



25. 22 und 23 Berichte uber die Thatigkeit des Offenbacher Vereins fur Natur- 



kunde vom 29 April, 1880, bis 4 Mai, 1882, Offenbach a. M., 1883. 



26. Tillaeg til Aarboger for Nordisk Oldkyndighed og Historie, 1881, 



Kjobenhavn, 18S2. 



27. Papers, Proceedings, and Report of the Royal Society of Tasmania, 188L 



28. Verhandlungen der K. K. Zoologisch-Botanischen Gesellschaft in Wien, 32 



Band, 1882. 



29. Offenes Schreiben auf Herrn Baron Osten Sacken's "Critical Review"' 



Meiner Arbeit uber die Notacanthen, Von Prof. "Dr. Friedrich Brauer. 



