NOTE. 



The new species of fossils described in this preliminary report, by 

 Professor E. P. Whitfield, from the Potsdam, Jurassic, and Cretaceous 

 formations, are such forms as are new to science in the collections made 

 by W. P. Jenney and H. Newton during the exploration of the Black 

 Hlls of Dakota in the summer of 1875. 



These forms, with many others from the same formations, are em- 

 bodied in the final report on the paleontology of this region, which, 

 with sixteen lithographic plates, will accompany the publication of the 

 final results of the exploration in the Black Hills. 



July, 1877. 



