82 



TRANSACTIONS OF THE 



Place in the Geological series, — Atlantic secondary, 

 of New Jersey. 



Genus Geosaurus. Cuv. 



Lacerta gigantea. Soemerring. 

 G. Mitchilli. Dekay. 



Ann. of the Lyc. Nat. Hist, of New York, vol. iii. p. 138, pi. iii. fig. 3, 4. 



Dr. Dekay has established the existence of this genus 

 in the United States, upon a fossil tooth, with a small 

 portion of jaw attached. 



" From various considerations we should be disposed 

 to place this tooth among the most anterior of the lower 

 jaw. Its elevated position on its osseous support, places 

 it in the group composed of Mosasaurus and Geosaurus, 

 while its compressed shape removes it from the former. 

 The tooth now described agrees witli those of the Geo- 

 saurus in shape, attachment, and mode of dentition." 



Judging from the size of the tooth, the American 

 species must have been of much larger dimensions than 

 the European, or Monheim species. (G. Soemerringi, 

 Dekay.) 



Locality. Monmouth, New Jersey. 

 Place in the Geological series. New Jersey se- 

 condary. 



