( XXI ) 
SUISSE. 
Berue. — Nalurforschende Gesellschaft. 
Société helvétique des sciences naturelles. 
Genève. — L'enseignement mathématique, directeurs : MM. Fehr 
et Laisanï. 
leuchâtel. — Société des sciences naturelles. 
Zurich. — iVaturforschende Gesellschaft. 
AMÉRIQUE. 
ÉÏATS-DiMS. 
Arbor (Mich). — University of Micingan (LihrarijJ 
Austio. — Texas Academy of sciences. 
Baltimore. — American Journal ofmathematics. (Johns Hopkins 
University. J 
Beriieley (Col.) — University of California (Press). 
Bositon. — American Academy of arts and sciences. 
Society of natural Hislory, 
Camliriflse (Mass.). — Muséum of comparative Zoology. 
€liicag;o. — Field Muséum of natural history. 
Cincinnati (0.) — American association for the advancement 
of sciences. 
Cold Sprinis Harbor (iN.Y.i. — Carnegie Institution (station 
for e.i perimentale evoluf ion ; d\i CQlcur : M C. B. Davciiporr). 
Colorado. — Colorado Collège (bureau des publications), 
Des* lloiues (low a). — Qeological Survey . 
liMiwrenee (Kan). — The Kunsas University. 
L.ineolu (Neb.). — University of Nebraska. 
iladison. — Wisconsin Academy of sciences, letters and arts. 
Géologie al Survey. 
Hew-Haven. — Conneclicut Academy o farts and sciences. 
