FOURTH FLOOR 
The visitor now finds himself in the Marine Reptile Corridor 
(No. 405) on the walls of which are displayed several remarkable 
fossils. The largest of these is of a Mosasaur, a huge Fossil 
marine lizard, 30 feet in length. On the easterly wall Reptiles. 
are several Ichthyosaurs; one of these will be seen to be ac- 
companied with young. 
The Anighito meteorite, weighing more than 6,000 pounds, is 
temporarily installed in this corridor. 
Passing now towards the east, one enters the Hall of Fossil 
Mammals (No. 406). The-general arrangement of this hall is 
on the “alcove plan.’’ The collections of the de- Fossil 
partment include the famous Cope Collection. Along Mammals. 
the north side are groups of fossils illustrating among other 
forms the origin and development of Primitive Hoofed Mammals, 
Carnivores, Mastodons, Elephants and Even-toed Hoofed Mam- 
mals. Along the south side the Titanotheres, Rhinoceroses 
and Horses receive special treatment. Watercolor restorations 
show the supposed appearance in life of some of these re- 
markable animals. The specimens are elaborately labeled and 
there are special Guide Leaflets, ‘‘ The Collection of Fossil Ver- 
tebrates "" and “ The Evolution of the Horse,’’ which may be 
borrowed or purchased of the attendant. 
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