27 
HALLS 35, 36, AND 69. 
PALEONTOLOGY. 
The section of Paleontology is located in Halls 35, 36, and 59. 
Here, by fossils, casts, and models, are illustrated the animal and 
vegetable forms which have characterized the life of the globe at 
the succeeding stages of its history. The arrangement is chron- 
ological, and the order to be followed in a study of the collection 
is indicated by the numbering of the cases. The series begins in 
Hall 35, at the left of the entrance from the west court, passes along 
the w^est 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 con- 
founded with actual specimens. The visitor will find it interesting 
to note the characteristic forms of li^p of the different epochs, and 
the increase in^ number and variety of species as the earth’s his- 
tory advanced. 
Case 1 A, Hall 35. — Laurentian. The only fossil illustrat- 
ing this period is the problematic Canadense,<s>^v^x2l speci- 
mens of which are shown. It is thought by some to represent the 
fossil remains of a gigantic Rhizopod,,but is generally considered 
to be of wholly inorganic origin. 
The remainder of Case 1 and part of Case 2. — Fossils 
the Silurian age, or age of Invertebrates. Here we find all of the 
great types of animals represented except the Vertebrates; the 
Protozoa by Sponges and Rhizopods ; the Radiates by Graptolites 
and the Crinoids ; the Mollusks by Pteropods, Gasteropods, and 
Cephalopods ; the Articulates by Crustaceans and Worms, 
Plants are represented by Fucoids, 
