26 Š ; THE FOSSIL REPTILES 
the animals found in these beds were bivalves, with nu- 
merous Brachiopoda and Cephalopoda, or Cuttle-fish. Of 4 
the unsymmetrical univalves, or Gasteropoda, compara- 
tively few specimens occur in the Cretaceous marl of New 
Jersey. 
Of Vertebrata, or those animals provided with a back 
bone, or vertebral column, numerous species, large and 
small, dwelt on the land and in the water. Their number 
has been so considerable, especially in the region opened 
by the diggings of the New Jersey Marl Company, as to 
materially affect the richness of the marl in phosphate of 
lime. Of cartilaginous vertebrates, such as the Sharks, 
we have found remains of the genera Otodus, Lamna and 
Carcharodon. Some of these were not only very nume- 
rous but attained a great size, and were of ferocious 
habits. There were also Saw-fishes closely allied to those 
of the present day. Fewer remains of the bony fishes, 
such as the Perch and Cod, have been procured from 
these pits; while in other neighborhoods Sword-fish and 
long fanged Sphyreena types have occurred. 
In huge reptiles the region has been especially prolific. 
Through the care of Superintendent Voorhees, the remains — 
of seven of the larger species have been exposed and pre- 
served during the excavations. Four of these belonged to 
the group of Crocodiles ; namely :— 
Thoracosaurus Neocesariensis DeKay ; carnivorous. 
Thoracosaurus obscurus Leidy ; 
Bottosaurus Harlani Meyer ; ti 
Macrosaurus levis Owen; eae? 
Hyposaurus Rodgersi Owen ; ? 
- These were probably dwellers by the cha and de- 
vourers of the large fishes and of any luckless reptiles 
strolling on | the beach. ee ee oF the still 
Ri Os SAS e ee 
See a A 
