PALEOZOIC FAUNAS OF MISSOURI 
37 
(d.) The lower of these contains a fauna which apparently 
includes the Burlington and Keokuk faunas of^Halhs Iowa report. 
(^.) Above this (and the evidence is not positive hut probable 
pointing to unconformity), comes a higher series of cherty lime¬ 
stones with a fauna described as “Warsaw,” as “St. Louis,” or 
under some other name, but as here represented not divisible into 
distinct groups. This is terminated, or, when absent, is represented 
by a sandstone which is equivalent in some places to the “Ferru¬ 
ginous Sandstone” of the earlier Missouri reports. 
(f.) Above these lie the Coal Measures, which may be sub¬ 
divided, but for that purpose sufficient data are not at present ac¬ 
cumulated. 
These six terranes (a. b. c. d. e. E.) are faunally distinct from 
each other, and in the present stage of my investigations, I am 
not ready to recognize for those of the upper Palaeozoic series in 
western Missouri, any finer subdivisions of the faunas. 
The lines capable of sharpest delimitation are those between the 
Silurian terrane a. and the overlying terrane which may be either 
B. c. or D., between c. and d., and between E. and E. 
The following is a list of localities from which fossils have 
been collected by Messrs. W. P. Jenney, of the U. S. Geological 
Survey, James D. Robertson, of the State Survey, during the 
progress of the investigations in the lead and zinc regions, and 
Gilbert van Ingen, under my direction, in the course of investi¬ 
gations for the elaboration of the Devonian and Carboniferous 
faunas of the United States. 
The materials have been submitted to preliminary examination, 
and the letters in the columns on the right indicate the faunas of 
the horizons referred to above, to which the fossils from each 
locality belong, i. e., a is Silurian; b is Black Shale; c is Chouteau 
group, of Broadhead; d is Middle Mississippian, equivalent to 
“Burlington” and “Keokuk;” E is Upper Mississippian, equivalent 
to part of the “Warsaw,” and the “St. Louis;” and E is Coal 
Measures. 
