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The Glyptodon differed from the Megatherium in the structure 
and number of.the teeth, and from all known Armadillos in the 
form of the lower jaw, and the presence of a long process descend- 
ing from the zygoma; and approached in both these respects to the 
Megatherium. ‘The teeth differ from those of Armadillos, in ha- 
ving two deep grooves both on the outer and inner surface, are more 
complex than those of any known Edentate, and indicate a passage 
from that family into the Toxodon. The ungual phalanges are 
wholly unlike those of the Megatherium, and most nearly resemble 
those of Dasypus, but are short broad and flat, and seem to have 
been covered with hoof-like claws. The form of the foot most 
nearly resembled that of the fore foot of the Mole. Having ap- 
propriated to the Glyptodon the armour supposed to belong to 
the Megatherium, Mr. Owen next proves that the latter animal was 
unprovided with any such bony covering, arguing from a compari- 
son of its vertebral column and pelvis with that of the Armadillo; 
and from the absence of the oblique processes, which in the lori- 
cated Edentata resemble as to form and use the éze-bearers in 
carpentry, that support the weight of a roof. The vertebral con- 
ditions of the Megatherium are nearer to those of the Sloths and 
Ant-eaters. We have accounts of twelve skeletons of Megatherium, 
not one of which was found to be accompanied by bony armour. 
Cuvier considered the Megatherium more nearly allied to the Ant- 
eaters and Sloths than to the Armadillos. 
Captain Martin has found that many parts of the bottom of the 
English Channel and German Ocean contain in deep water the 
bones and tusks of Elephants. They have been dredged up be- 
tween Boulogne and Dungeness, in the mid-sea between Dover and 
Calais, and at the back of the Goodwin Sands; also mid way between 
Yarmouth and the coast of Holland. In 1837 a fisherman enclo- 
sed in his net a vast mass of bones between the two shoals called 
Varn and Ridge, that form a line of submarine chalk-hills between 
Dover and Calais. Captain Martin says these bones do not occur 
on the top of banks or shoals, but in deep hollows or marine valleys. 
Sir John Trevelyan possesses the molars of a large Elephant from 
gravel in the bed of the Severn, near Watchet, and we have long 
known that the bones of Elephants occur in great abundance in the 
oyster grounds off Yarmouth. 
