iv 
LIST OF EXCHANGES. 
The Lick Observatory, San Francisco, Cal. 
The Canadian Institute, Toronto, Canada. 
Natural History Society, Montreal, Canada. 
Sociedad Scientifica, “Antonio Alzate,” City of Mexico, Mexico. 
Cambridge Philosophical Society, Cambridge, England. 
Royal Dublin Society, Dublin, Ireland. 
Natural History and Philosophical Society, Belfast, Ireland. 
L’Academie Royale des Sciences, des Lettres, et des Beax-Arts, Brux 
elles, Belgium. 
L’Academie des Sciences, Inscriptions et Belles-Lettres, Toulouse 
France. 
Naturforschende Gesellschaft, Zurich, Switzerland. 
R. Accademia delle Scienze, Torino, Italy. 
Societa Toscana di Scienze Naturali, Pisa, Italy. 
R. Accademia delle Scienze, Bologna, Italy. 
Kaiserliche Akademie der Wissenscliaften, Wien, Austria. 
Berliner Gesellschaft fur Anthropologie, Ethnologie, und Urgeshiclite 
Berlin, Germany. 
Societe Pliysico-Mathematique de Kasan, Kasan, Russia. 
