28 CRETACEOUS GROUP 



Geosaurus. 



PL xi. fig. 10. 



In a memoir lately published,* Dr. Dekay announces 

 the discovery, in New Jersey, of some remains of the 

 Geosaurus, a subgenus of Mosasaurus. I have annexed 

 an accurate representation of two teeth, with a portion of 

 the jaw, which have been kindly lent me for that purpose 

 by Dr. Dekay. 



Plesiosaurus.? 



Dr. Harlan, (Journ. Acad. Nat. Sciences, vol. iv.) 

 describes some remains which he supposes to have be- 

 longed to this animal. They consist chiefly of vertebrae, 

 and are preserved in the collections of the Academy. I 

 believe the remains of Plesiosauri have not hitherto been 

 found in Europe in any beds more recent than the Oolites. 



A recent inspection of these remains, causes me to en- 

 tertain doubts of their belonging to any animal of the 

 Saurian order. 



Crocodile. 



1. PI. xi. lig. 12, represents a tooth, found with seve- 

 ral others, together with a considerable portion of the 

 jawbone, near White Hill, N. J. in blue marl. ( Vide Dr. 

 Harlan's paper, in Journ. Acad. vol. iv. pi. I.) This 

 tooth is longitudinally striated, like those in " Tilgate 

 Forest," pi. v. fig. 2. 9. I found a vertebra of a croco- 

 dile in the marl of St. Georges, Delaware. 



* Ann. N. York Lyceum, Vol. iii. 



