54 GEOLOGICAL SURVEY OF THE TERRITORIES. 
collections, I am led to believe that all the first mentioned species are 
from the highly disturbed Laramie strata, while the latter are from those 
which lie unconformably upon the disturbed strata, and which have 
been generally regarded as Lower Tertiary beds by the geologists who 
have examined that region. Whether this latter view is correct or not 
it is certain that the strata of the Bear River division of the Laramie 
Group, are found to be displaced to a greater extent than any of the 
other strata which are referred to that group. 
The coal-bearing series near Evanston, Wyo., which in the report of 
this survey for 1877 I referred to the Laramie Group, appears, at that 
place, to rest conformably upon the brackish-water series, or the Bear 
River Laramie proper; but of this I was not then, and am not now, en- 
tirely satisfied. Those coal-bearing beds of the vicinity of Hivanston are 
probably equivalent with the coal-bearing beds at Wales, Utah, which 
latter beds are understood to belong to a series of strata which are ex- 
tensively developed in various parts of Utah, and which some. geolo- 
gists who have examined them regard as overlying more or less uncon- 
formably the equivalents of the Bear River Laramie series, and which 
are referred by them to the lowest Tertiary. Those Wales beds, however, 
contain at least two species, namely Goniobasis nebrascensis and G. tenui- 
carinata, which occur in the Laramie strata of the Upper Missouri River 
region, and also in those of Colorado east of the Rocky Mountains; 
and J showed also in the report of this survey for 1877 that the Evans- 
ton coal-bearing series contains other Laramie species which were orig- 
inally discovered in the Upper Missouri Liver region. As it is not my 
purpose, however, to discuss in this article the true character and rela- 
tions of those coal-bearing beds at Evanston and Wales and the Upper 
Kanab beds, all of which contain at least some Laramie species, I shall 
give in addition to the list of well recognized Laramie fossils only sep- 
arate unannotated lists of the supposed Laramie invertebrate fossils of 
other localities. The coal-bearing Evanston beds occurring at the only 
one of the supposed Laramie localities above mentioned which I have 
visited and examined in person, I give the lists from the other locali- 
ties upon the authority of other observers. 
Tt will thus be understood that [ am omitting from this article the 
discussion of some of the most important questions pertaining to the 
Laramie period, namely, the question of its continuance after the occur- 
rence of the great and extensive displacements which involved the strata 
of the Bear River brackish-water series and its equivalents; that of the 
original geographical continuity of the upper beds at Evanston, Wales, 
and Upper Kanab with the great body of the Laramie Group further 
eastward, and that of the continuity of deposition of the latter beds 
with the Wahsatch Group. The question of the true relation of the Bear 
River brackish-water beds with the great body of the Laramie Group 
has here also only a small part of the discussion which its importance 
demands. It is the great importance of these questions and the lack of 
sufficient opportunity to continue personal investigations of them in the 
field, that leads me to lay them aside now and wait for a suitable op- 
portunity to prosecute their investigation in a proper manner. 
The following is a list of the species that have been described from 
the coal-bearing beds of Bear River Valley in the vicinity of Evanston, 
Wyo., together with those which were originally described from other 
localities, but have been identified among the fossils of those beds. 
