Sand Formation of the United States. 289 



FOSSIL BONES. 



MOSASAURUs ? Couyheave. 



This saurian, so well known by the names of monitor, Maestricht 

 animal, &£c. is supposed to have been an inhabitant of the shores of 

 the American continent. This inference has been drawn from a few 

 teeth and vertebrae found near Sandy Hook and Woodbury, in New 

 Jersey. These remains have been described by Dr. Harlan, in the 

 Journal of the Academy,* and by Dr. Mitcliill in his notes to the 

 American edition of Cuvier's Theory of the earth. M. de Blain- 

 ville,f however, after examining the figure of a tooth given by Dr. 

 Mitchill, declares unreservedly that it belongs to the genus Ichthyo- 

 saurus : I am not aware that the latter has ever been found in Eu- 

 rope above the Oolitic series. 



PLESIOSAURUS. 



Dr. Harlan has also described J some remains which he considers 

 to belong to this animal. They consist chiefly of vertebree, and are 

 preserved in the collections of the Academy. If I recollect rightly, 

 remains of this animal have not been hitherto found in Europe in 

 any beds more recent than the Oolites. 



CROCODILE. 



The remains of the crocodile are of frequent occurrence. Con- 

 siderable portions of jaws with the teeth, and other bones, have been 

 obtained near White Hill§ and Haddonfield, in N. J. and at St. 

 George's, in Delaware : at these places they occur in micaceous 

 blue marl. They are also found in the limestone of Gloucester county. 



WHALE ? 



Bones of the whale are said to have been observed near Middle- 

 town Point, N. J. and on the route of the Chesapeake and Delaware 

 canal : those in the Academy, which are attributed to the whale, are 

 too imperfect to permit of a positive decision. 



SHARK. 



Teeth and vertebral bones in abundance ; the former are frequent- 

 ly two and a half inches long. 



* Vol. IV. p. 232, et seq. 



] Memoires surles Belemnites, p. 48. t Idem. 



§ Ibidem, Vol. IV. p. 15, et seq. 



Vol. XVU.— No. 2. 10 



