i8 
ALCOVE 103. HALLS 35, 36. 59, 60 AND 6 I . 
PALEONTOLOGY, 
In the Section of Paleontology it is sought to illustrate by 
fossils or by casts and models of these, the animal and vegeta- 
ble forms which have characterized the life of the globe at the 
successive stages of its history. The arrangement is primarily 
chronological, and secondarily zoological. 
Advancing from hall to hall the visitor sees the develop- 
ment of life upon the earth illustrated in the same order in 
which it occurred in Nature. Thus in the first hall of the 
series, Hall 35, are to be seen the fossils of the earliest era 
of the earth’s history, the Paleozoic; in the next hall. Hall 36, 
and part of the next. Hall 59, those of the middle era or Mes- 
ozoic ; and in the remaining three halls, the fossils of the 
Cenozoic or recent era. Within each hall, so far as is pos- 
sible, the fossils of each period are arranged so that those of 
the earliest period shall come first, then those of the next suc- 
ceeding age and so on. 
Within each period, however, the specimens are arranged 
in accordance with their zoological rank, beginning with the 
lowest. Fossil plants, where they occur, are thus placed first; 
then in order. Protozoans, Radiates, Mollusks, Articulates and 
Vertebrates. 
The specimen labels show: 1st, 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. 
ALCOVE 103. 
Here are shown several large specimens of general geologi- 
cal interest. Among them are two broad slabs of rock cut 
from ledges the surfaces of which had been scoured and pol- 
ished by movement of the continental glacier over them. One 
of the slabs is sandstone and comes from North Amherst, 
Ohio, the other is limestone and comes from Kelley’s Island, 
Lake Erie. Several types of glacial marking are illustrated on 
the slabs, including fluting and iceberg action. The slabs are 
probably the finest of the kind to be seen in any museum. 
