( xx ) 
DANEMARK. 
Copenhague. — Tidskrift for Mathematik : D' H. G. ZeuTHEN, 
professeur à l’université. 
Académie royule des sciences. 
SUISSE. 
Berne. — Valurforschende Gesellschaft. 
Société helvétique des sciences naturelles. 
Neuchâtel. — Societé des sciences naturelles. 
Schafhouse. 
Naturforschende Gesellschaft. 
AMERIQUE. 
ÉTATS-UNIS. 
American Association {or advancement of sciences. 
Baltimore. — American Journal of mathematics.(Johns Hopkins 
University.) 
Boston. 
American Academy of arts and sciences. 
Society of natural History. 
Cambridge. — Museum of comparative z0ology. 
Columbus. 
Madison. 
Ohio State agricultural Society. 
Wisconsin Academy of sciences, letters and arts. 
New-Haven. — Connecticut Academy of arts and sciences. 
Newport. — Orleans County Society of natural sciences. 
New-York. — Academy of sciences. 
Philadelphie. — Academy of natural sciences. 
American philosophical Society. 
Wagner Free Institute of sciences. 
Portland. — Vatural History Society. 
Salem. The American Naturalist. 
Essex Institute. 
Peabody Academy of sciences. 
San-Franeisco. — Californian Academy of sciences. 
Washington. — Snithsonian Institution. 
