— BB 8 - 
Colonie du Transvaal. 
Johannesbourg. Geological society of South-Africa. 
Amérique 
Canada. 
Ottawa. 
Geological survey of Canada. 
Royal Society of Canada. 
Toronto. 
Canadian Institute. 
Chili. 
Santiago. 
Société scientifique du Chili. 
États-Unis. 
Baltimore. 
American Chemical journal. 
Maryland geological survey. 
Berkeley. 
Boston. 
University of California. Department of geology. 
American academy of arts and sciences. 
— Society of natural history. 
Cambridge. Muséum of comparative zoôlogy. 
Chicago. Academy of sciences. 
— Journal of geology. 
Colorado. College studies. 
Columbus. Geological survey of Oliio. 
Davenport. Academy of natural sciences. 
Denver. Colorado scientific society. 
Des-Moines. Jowa geological survey. 
Indianapolis. Department of geology and natural resources. 
— Indiana academy of science. 
Jefferson. 
Missouri geological survey. Bureau of geology and 
mines. 
Lanting. 
Lawrence. 
Madison. 
Michigan academy of sciences. 
Office of Kansas University. 
Wisconsin geological and natural history survey. 
Missoula. University of Montana. 
New-Haven. American journal of sciences. 
New-York. Academy of sciences. 
