SIXTH ORDINARY MEETING. 35 
The following exchanges were announced : 
. The American Journal of Science, Vol. 26, No..156 for December, 1883. 
. Journal of the Franklin Institute for December, 1883. 
. The Canada Practitioner, December, 1883. 
. On the Osteology and Development of Syngnathus Peckianus, (Storer) by 
J. Playfair McMurrich. 
. Journal of the Royal Dublin Society, Vol. 2, 1858-’59. 
. Sitzungsberichte und Abhandlungen der Naturwissenschaftlichen Gesell 
schaft ‘‘ Isis” in Dresden, Januar bis Juni. 
. Science Vol. 2, (No. 43, November 30, 1883.) 
. Constitution and By-Laws of the Chicago Historical Society, 1882-83. 
. Second Annual Report of the United States Geological|Survey for 1880-81. 
. Twelfth Annual Report of the U. 8. 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 
land 2. 
. Maps and Panoramas to the above. 
. United States Geological Survey, Monograph 2; Territory History of the 
Grand Cation District by Clarence C, Dutton. 
. Atlas to accompany the same. 
. Bulletin of the U. 8. Geological Survey, No. 1. 
. Magazine of American History of December, 1883. 
. 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. 
. Scientific Proceedings of the Royal Dublin Society, Vol. 3, (N. S.), 
August, 1882, Part 5. 
. Verhandelingen der K. Akademie Van Wetenschappen, Twee en 
Twintigste Deel. 
. Verslagen en Mededeelingen der K. Akademie Van Wetenschappen. Af- 
deeling Natuurkunde, T'weede Reeks, 17th Deel, Parts 1, 2, 3. 
. Jaarboek Van de K. Akademie Van Wetenschappen, Amsterdam, 1881. 
. Memoirs of the Geological Survey of India, (Paleeontologia Indica), Series 
OS Viol. 2; Part 5. 
. Jahrbuch der K. K. Geologischen Reichsanstalt, 1883, Band 33, Numbers. 
1, 2, 3, January to September, 1883. 
. Oversigt over det Kongelige Danske Videnskabernes Selskabs, Forhand- - 
ling og dets Medlemmers Arbejder i Aaret, 1882, No. 3, 1882, and No. 
1, 1883, Kjobenhavn. 
. Mémoirés de la Société Royale des Antiquaires du Nord, Nouvelle Série, 
1882-83, 1584 Copenhague. 
. 22 und 23 Berichte uber die Thitigkeit des Offenbacher Vereins fiir Natur-. 
kunde vom 29 April, 1880, bis 4 Mai, 1882, Offenbach a. M., 1883. 
. Tillaeg til Aarboger for Nordisk Oldkyndighed og Historie, 188], , 
Kjobenhavn, 1882. 
. Papers, Proceedings, and Report of the Royal Society of Tasmania, 1881.. 
. Verhandlungen der K. K. Zoologisch-Botanischen Gesellschaft in Wien, 32: 
Band, 1882. 
Offenes Schreiben auf Herrn Baron Osten Sacken’s ‘‘Critical Review” 
Meiner Arbeit iiber die Notacanthen, Von Prof.*Dr. Friedrich Brauer: 
