170 



NATURAL SCIENCE. 



March, 



the Cretaceous, Tertiary, and Diluvial formations. The series opens 

 with a collection of Cenomanian plants, consisting of more than 200 

 species, mostly conifers, cycades, and dicotyledons, described by 

 Dr. Velenovsky. The marine fossils from Cenomanian to Senonian 



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are represented by the originals of Dr. Fritsch's studies of the Chalk 

 formation of Bohemia, and of the monographs on fishes, cephalopods, 

 and crustaceans pubHshed by him, and by Drs. Pocta, Kafka, and 

 others. Among the Tertiary fossils, the original land and fresh-water 



