228 



having originated during a somewhat different epoch from that 

 which produced the European greensand formation. 



The following list embraces nearly all the organic remains of 

 the upper secondary series, hitherto discovered in New Jersey. 

 It is compiled principally from the synopsis of Dr. Morton. 



orgamc remains of the greensand formation. 



Reptiles. 



Mosasaurus. — Teeth, vertebra, and bones of the extremities of 

 this large massive saurian, have been found at various points in 

 the greensand tract, in the excavations made for marl. They 

 are thought to be identical with those of the Mosasaurus of 

 Europe. 



Geosaurus. — Teeth, with a portion of the jaw. 



Crocodile. — Teeth and other portions, indicating three species, 

 occur in the greensand. 



Saurodon, (Hays). — Portions of a jaw of an extinct animal; the 

 relations of which are not very clearly known. It is thought 

 to be analogous to the saurians. 



Great saurian, (o^ Honfteur). — I have discovered two vertebrae in 

 the greensand near Big Timber creek, which I regard as either 

 identical with, or very closely allied to bones figured by Cuvier 

 from Honfleur, which he considers to approach nearer to the 

 plesiosaurus than to any other genus. 



Testudo. — Several bones of a large species of the order Testiido. 



Coproliles.' — These bodies have been occasionally met with, espe- 

 cially in the neighbourhood of Crosswick's creek, near the top 

 of the stratum. In the present instance, they are most probably 

 the fossilized dung of a species of crocodile ; some of the bones 

 and teeth of which occur near them. 



Fishes. 



Squalus. — Teeth and vertebras of several species, considered for- 

 merly to belong to the genus Squalus, but lately placed by 

 Agassiz under genera only more or less allied to the shark, are 

 abundant in nearly every part of the greensand formation. 



Sphyrcena. — Part of a jaw and several teeth of this curious 

 genus of fishes have been found in the greensand, in Monmouth 

 county. 



