94 Review of Owen’s Geological Report on Wisconsin, Iowa, etc. 
The 5th chapter contains a discussion on the age of the red 
sandstones of Lake Superior, and the evidence from which it 1s 
inferred, with great probability, that its general dip is southeast, 
bringing it underneath the Lingula, Orbicula, and Obolus beds of 
the St. Croix Valley, and that they therefore constitute the strata 
intervening between these beds and the crystalline schists that 
repose on the granite. 
The incidental observations in the Eocene Tertiary basin of 
the Mauvaises Terres or Bad Lands of Nebraska and the adjacent 
cretaceous deposits, are recorded in the 6th chapter from which 
we have already given extracts in our March number. 
e extraordinary fossil mammalia collected during the survey 
in this region, were submitted for description to the able com- 
parative anatomist, Dr. Joseph Leidy of Philadelphia, whose Re- 
port on this branch of the paleontology, will be found com- 
mencing on page 539 of the volume. 
Dr. B. F. Shumard’s report comprises the details of his obser- 
vations among the protozoic rocks of the Minnesota Valley, an 
minute stratigraphical and palzontological details of the most m- 
teresting sections on both sides of the Mississippi River, from the 
falls of St. Anthony to the confines of the carboniferous rocks, 
near Wyoming, as well as on the Wisconsin River, between 1ts 
‘mouth and the igneous exposures on Whitney’s Rapids. 
The Appendix to the report contains the description of new 
fossil species and genera, collected during the survey from the 
protozoic rocks, the limestones of Cedar Valley, the carboniferous 
rocks and the cretaceous deposits, followed by a systematic cata- 
logue of plants collected by Dr. C. C. Parry, in connection with 
the geological survey, made during the season of 1848; also 4 
systematic catalogue of birds observed by Mr. Pratten, in the 
northern part of Wisconsin and southern portion of Minnesota. 
There are also appended tables of the stratigraphical and ge 
graphical distribution of fossil of the northwest and the equiv- 
alency of strata. 
| wuspices conducted, as wel 
as to all concerned in it; it stands out in strong contrast with 
