B74 Scientific Intelligence. 
executed by the Survey, is covered with a uniform deposit of 
clay, or clayey mud, usually very soft and bluish or drab m 
ons. 
character of the bottom, while below 30 to 40 fathoms, where the 
Pontoporeia affinis Lindst., at nearly every haul from the 
y catus, marine species, and were supp ft 
by Lovén to have been derived from ancient marine species le 
in the lake basins by the recession of the ocean. The occurrence 
k . 
this brief notice. In the shallow waters many interesting y aaity’ 
7 ? 
6. A. Featherman: Report of Botanical Survey of Southerm 
and Central Louisiana. Yn sa et Report of the Board of 
Supervisors of Louisiana State University, for year 1870. New 
Orleans, 1871.—The Botanical Report, séparately paged, fills 130 
pages. Professor Featherman is | Peat on Botany in the us 
