HALLS 35, 36, AND 59. ALCOVE 103. 
PALEONTOLOQY. 
In the Section of Paleontology it is sought to illustrate by fos- 
sils, casts and models, the animal and vegetable forms which have 
characterized the life of the globe at the succeeding stages of its 
history. The arrangement is primarily chronological, and sec- 
ondarily zoological, and the order to be followed in a study of the 
collections is indicated by the numbering of the cases. Passing 
from left to right, as one would do in reading a book, the collect- 
ion may not improperly be regarded as a book describing the his- 
tory of the earth from the dawn of life to the present time, though 
the characters in which it is written are rock specimens instead of 
printed letters. The series begins in Hall 35, at the left of the 
entrance from the West Court, passes along the west wall, the 
south wall of Halls 36 and 59» then to the other side of the same 
rooms, and back to the right of the entrance to Hall 35. The 
larger specimens in the center of the halls it was impracticable to 
place in chronological order, but the specimen labels show the 
period to which each belongs. All the specimen labels show: ist, 
the name of the species, together with that of the authority by 
whom named ; 2nd, the geological period or epoch to which each 
belongs ; and 3rd, the locality. Wherever a cast is shown, the 
fact is indicated by the label, so that it may not be confounded 
with original specimens. 
Under each period the specimens will be found arranged in 
accordance with their zoological rank, beginning with the lowest. 
Plants are placed first ; then in order. Protozoans, Radiates, Mol- 
lusks. Articulates and Vertebrates. 
The visitor will find it interesting to note the characteristic 
forms of life of the different epochs, and the increase in number 
and variety of species as the earth’s history advanced. 
A large chart upon the wall of Hall 35 shows the order of suc- 
cession of the geological periods as they are known by name and 
will be found convenient for reference in order to determine the 
chronology of the different periods. 
Alcove 103. — Two large blocks, one of limestone from Kel- 
ley s Island, Ohio, the other sandstone from North Amherst, 
Ohio. These illustrate glacial scoring and polishing. 
