Wall-case, 
No. 8. 
Table-case, 
No ll. 
Mosasau- 
l'US. 
28 
Squamata — Mos as aunts. 
The limbs are modified into paddles with no claws to the 
terminal plralangeals and no foramen to the humerus. The 
majority of forms were devoid of dermal scutes. 
Fig. 34. — Superior aspect of the cranium of Platecarpus curtirostris , Cope ; from the 
Upper Cretaceous of N. America (greatly reduced), pmx, premaxiUa; vix, maxilla; 
fr, frontal ; prf, prefrontal (after Cope). 
Fig. 35. — Lateral and profile views of a lower tooth of Liodon , sp. 
from the Upper Cretaceous of Maestricht, Holland, ,. 
These great aquatic lizard-like reptiles, known as the 
Mosasaurus, Liodon, etc., once inhabited the shores of the sea in 
which the uppermost Chalk, or Maestricht beds, were deposited, 
and their powerful jaws, armed with great grooved, recurved, 
conical teeth, their vertebrae and various other skeletal remains 
have been obtained from St. Peter’s Mount, near Maestricht, 
Holland, and from the Chalk of Norfolk and Kent. Remains 
of over forty species have been found in the Cretaceous rocks 
of New Jersey, Kansas, &c., in North America. One of 
these, the Mosasaurus princeps , is computed to have been 75 to 
80 feet long. In one case at least the body was covered with 
