The Lance Creek Beds, Wyoming. — Hatcher. 371 
Judith region the relations of the Fox Hills sandstones to the 
superincumbent strata is everywhere observable." After a per- 
sonal examination of this region, however, I am convinced 
that the actual stratigraphy is not as simple as the text and 
published sections of Cope would indicate. Moreover he him- 
self mentions the finding of dinosaur remains and Fox Hills 
invertebrates in the same stratum in this legion. 
Osborn points out the fact that, while the Belly River and 
Judith River faunas include many identical species, there is 
very little in common between them and the Lance Creek beds 
of Converse county, Wyoming. He recognizes in the material 
from the Montana (Judith River) beds, types which are older 
than the Laramie, and suggests some confusion in the collec- 
tions and that several horizons may be represented in collec- 
tions that have generally been referred to the Judith River 
beds. The entire discussion of this question is, in every sense, 
admirable and one cannot help appreciating the methods by 
which he has arrived at what seems a correct solution of the 
problem in spite of what may prove to be somewhat erroneous 
ideas as to stratigraphy. It is a clear vindication of the per- 
fectly trustworthy nature of the evidences furnished by cer- 
tain classes of fossil vertebrates for purposes of correlation. 
After this very decided advance toward a satisfactory ad- 
justment of the Laramie imbroglio it is with somewhat differ- 
ent feelings that one turns to a recent note in Science by Dr. 
S. W. Williston, entitled "The Laramie Cretaceous of Wyom- 
ing."* After noting professor Osborn's conclusion that a 
portion at least of the Montana deposits previously referred to 
the Laramie may really be !Mid-Cretaceoust in age and contem- 
porary with the L'elly River beds, and a similar opinion pre- 
viously expressed by the present writer. Dr. Williston says : 
"The Laramie deposits of Converse county, Wyoming, have 
usually been placed at the end (close) of the Fox Hills, but I 
am somewhat skeptical of this. I believe that future research 
will show that not only the Judith River beds, but also those of 
Wyoming, will be found to be contemporary, in part at least, 
with the Fox Hills deposits, and that they are not separated 
by so great an interval from these other (which other?) de- 
• Science, N. S., vol. xvi, pp. 952-953. 
t By Mid-Cretaceous I do not mean Middle Cretaceous, but as being under- 
lain and overlain by deposits clearly pertaining to the Cretaceous. 
