Geology and Mineralogy. 61 
by imperfect specimens. Besides Brontotherium, several other 
new genera of this group were found, represented by portions 
of over 200 individuals. With these remains was discovered 
cerebellum and olfactory lobes have even diminished in size. 
here is some evidence that the same general law of brain-growth 
holds good for Birds and Reptiles from the Cretaceous to the 
present time, 
Some additional conclusions in regard to American Tertiary 
far as no own, are as follows: First, all the 
Ungulata from the Eocene and Miocene had upper and lower 
Meisors; second, all Eocene and Miocene mammals had separate 
scaphoid and lunar bones; third, all mammals from these forma- 
tions had separate metapodial bones. 
In conclusion, Professor Marsh stated that his work in the field 
aS now essentially completed, and that all the fossil remains 
in i ere now in the Yale College 
Museum, In future, he should devote himself to their study and 
full description; and hoped at no distant day to make public the 
eee results, ae 
; tteport upon Geographical and Geological rations 
and Surveys sale of the 100th Meridian, in charge of Lieut. G, 
: Army. 
