

Note. — This paper is iutroductory to a contemplated work on the 

 foraminifera and other microscopic organisms of the Cretaceous 

 of Minnesota. According to present plans this work will be 

 done by Messrs. Woodward and Thomas, jointly, and it will be 

 published in one of the volumes of the final report of the survey. 



N. H. W. 



