VERTEBRATE PALHZONTOLOGY 7 
carnivora, rodents and other forms. Many of these will be new to 
science and all of them will aid greatly in filling out our collections 
from the later Eocene. Mr. Granger paid much attention to the strati- 
graphy of the formation, and the origin of the materials composing it, 
obtaining data which, with the collections of fossils secured at different 
levels, will enable us to fix accurately the time relations of the Washa- 
kie to the Bridger and Uinta formations (Middle and Upper Eocene). 
SCENE IN WASHAKIE BASIN 
The third expedition was conducted by Mr. Albert Thomson in the 
Lower Miocene of South Dakota. The formations of this age in the’ 
Western States are in general very barren of fossil mammals and have 
been but little explored, although the formations above and beneath 
them have yielded large collections to the explorations of the past half- 
century. By dint of diligent and thorough search Mr. ‘Thomson suc- 
ceeded in getting from these unpromising beds a considerable collection 
of skulls and skeletons, nearly all of them new to science and repre- 
senting an intermediate stage between the Oligocene and later Miocene. 
Among the interesting novelties of this collection is a fragmentary 
skeleton of a gigantic Wolverene as large as a jaguar or a black bear. 
