GEOLOGICAL SOCIETY. 



81 



Place in the Geological series. — Secondary limestone 

 of the sub-cretaceous group. 



We are indebted to Major N. A. Ware for the speci- 

 mens, who obtained them at St. Louis, from a fur trader 

 or trapper, who, u on his return home from the Rocky 

 mountains observed in a rock the skeleton of an alligator 

 animal, about seventy feet in length; he broke off the 

 point of the jaw as it projected. He said that the head 

 part appeared about three or four feet long."* 



Genus Mosasaurus, Conybeare. 

 Maestri cut monitor, Cuv. 



Ossemens Fossiles, vol. v. part 2, ed. 3d. p. 310 ; Harlan, Journ. Acad. Nat. 

 Sciences of Philad. vol. iv. pi. xiv. ; Silliman's Journal, vol. xvii. ; Dekay, 

 Ann. of the Lyc. of New York, vol. iii. pi. xiii. p. 134. 



Locality. From a "marl pit" near Woodbury, 

 Monmouth county, New Jersey. 



Specimens of the teeth, and probably of the femur, 

 in the cabinet of the Academy of Natural Sciences, and 

 the jaw teeth in the cabinet of the Lyc. Nat. Hist. N. 

 York. 



These remains are completely fossilized and impreg- 

 nated with iron, dense and heavy, and of a deep dark 

 color. The teeth of the second series, whilst they yet 

 remain the sockets, are serrated on the edges. 



* Baron Braunsberg Maxiraillian Prince de Wied, during his recent visit to 

 Philadelphia, on his return from the Rocky mountains, informed me that he 

 had obtained the fossil skeleton of a saurian animal, fifteen feet in length, from 

 the " great bend" of the Missouri river, which on comparison of its characters 

 with those of the animal above noticed, he thinks belongs to the same species. 

 Vol. I— L 



