GEOLOGICAL SOCIETY. 



83 



Genus Saurocephalus, Harlan, 

 S. lanciformis, Harlan, 



Journ. Acad. Nat. Sciences of Philad. vol. iii. p. 331, pi. xii. 1824. 



This new fossil genus was originally established on the 

 dental bone and teeth, discovered in 1804, by Lewis & 

 Clark, in their u Expedition to Columbia river," by 

 whom it was presented, on their return, to the Ameri- 

 can Philosophical Society, in whose cabinet it remained 

 unknown and neglected, until about ten years since we 

 published our description and figure in the work as above 

 referred to. 



Place in the Geological series. — Secondary lime- 

 stone? Missouri, (subcretaceous group.) 



This fossil genus has been further confirmed by the 

 subsequent discovery by Mr. Lea of a distinct species 

 of the same genus, in a " marl pit" of New Jersey, 

 which was imperfectly described by Dr. Hays, as the 



Saurocephalus Leanus, 



Trans, of the Am. Philos. Soc. new series, vol. iii. p. 471, pi. 16, 1830. 



Locality. In a i( marl pit" near Moorestown, New 

 Jersey. 



Place in the Geological series. — Atlantic secondary, 

 New Jersey. 



Very soon after the memoir on the last named species 

 was presented to the American Philosophical Society, 

 we took occasion to read the following observations be- 



! 



