302 GEOLOGY. 



cies, all of which were gigantic, was allied to the arma- 

 dilloes of the present day. One species is represented 

 in the rear part of Fig. 177. This animal had a shell 

 somewhat like a turtle. This solid coat of mail is com- 

 posed of innumerable plates joined together by serrated 

 or. notched sutures. Looked at from within, they are 

 hexagonal, but externally they form a mosaic of rosette- 

 like figures. Remains of this shell were first found in 

 company with bones of the megatherium, and were sup- 

 posed to belong to that animal. But the truth was soon 

 discovered on finding an entire shell, which is now in the 

 museum of the College of Surgeons in London. This 

 shell is nine feet in length, and the curve, measured 

 across, is seven feet. It is large enough to cover over a 

 large number of the armadilloes of the present day. 



412. "Whales. These animals appeared in localities in 

 the Post-tertiary period far away from their present hab- 

 itats. The sea in that age extended up as an arm where 

 the St. Lawrence now runs, and covered the present lo- 

 cality of Lake Champlain. Whales and seals flourished 

 there at that time, and their remains have been found 

 among other spots in the neighborhood of Montreal. In 

 Fig. 178 you have a representation of the bones of the 



Fig. ITS. 



head of a small whale, similar to the existing white 



