31 
■was a huge, clumsy beast, its enormous femur, three times as 
thick as an elephant’s, being used for supporting the animal while 
with its fore limbs it tore down branches of trees for food. 
Pedestal 3. — Restoration of Colossochelys atlas, one of the 
huge turtles of the Tertiary period. 
Floor Case C.— Complete skeleton of Dinornis, a cursory 
bird of great size and strength, which lived till recently in New 
Zealand, but has now become extinct. 
HALLS 60 AND 61 . 
GEOGRAPHIC GEOLOGY. 
The purpose of this collection is to illustrate in a vivid and 
realistic way the surface configuration of the earth. The chief 
feature of the exhibit is a series of relief maps which reproduce 
on as natural and representative scales as practicable, the topo- 
graphy and structure of selected portions of the earth’s surface. A 
part of the series show only topography and sculpture, while an- 
other part shows geological structure as well as topography. To 
some extent, the topography is shown on one map and the geolo- 
gical structure on another, so that both elements are represented 
with the greatest distinctness. The portions of the surface se- 
lected to be represented are usually such as to portray some typi- 
cal form of surface sculpturing or of volcanic accumulation. Some, 
however, represent natural or political divisions. 
In addition to the relief maps, there are models showing geo- 
logical structure or illustrating methods of development. Some of 
these are dissected so as to show the more intimate structure of 
the formations. The exhibit also contains a collection of globes, 
wall maps, portfolios, and other geographic material. The fol- 
lowing is a list of the principal features: 
RELIEF HAPS SHOWING TOPOGRAPHY ONLY. 
No. 1.— Relief map of the World on Mercator’s Projection. 
Horizontal scale 630 miles to i inch. Vertical scale 78 times the 
horizontal. 
