BEEDE AND ROGERS.] Coal Measures Faunal Studies. 321 
cise geographic localities and layers from which they were 
taken.26" The first of these appeared in 1900. 
The Collections. 
The original plan was to make careful and extended collec- 
tions along the Kansas river section from Kansas City to the 
Permian outcrop west of Manhattan, this section crossing all 
the rocks of the Upper Coal Measures, and then to collect from 
the Lower Coal Measures in the southeastern part of the state, 
and from these determine the faunal succession. One of the 
writers residing at the time in Kansas City and the other in 
Topeka offered exceptional facilities for this plan. This part 
of the plan was carried out and the two authors together col- 
lected from the Lower Coal Measures in southeastern Kansas. 
The season of 1903 was spent by the writers in making this 
collection and in continuing up the Neosho river to Emporia 
and the Cottonwood river to Strong, thus giving a second 
transverse section of the entire Coal Measures rocks of the state 
from over a hundred miles to about fifty miles south of the 
Kansas river section. 
Aside from this, one of the writers spent the season of 1904 
with Prof. E. H. Sellards, and the season of 1905 collecting 
from the Permian outcrop, from Nebraska to the Oklahoma 
line. In this work the five or six upper formations discussed 
in this paper were collected from at intervals throughout the 
distance from Manhattan to Oklahoma. 
The Neosho river section approaches quite closely to the 
Kansas river section above Emporia, and for this reason it is 
not so valuable for determining the distribution of the species 
as its lower portion, which is more than a hundred miles dis- 
tant. However, the collections from the upper horizons over 
an even greater extent of outcrop overcome this disadvantage 
to some extent. 
In the papers already referred to the exact localities from 
which the collections were made are given, together with a 
provisional fanual list from each. A list of these localities is 
appended to this article. The idea of determining the relative 
abundance of each species numerically was developed after the 
initiation of the work. Aside from the original Kansas river 
267. (1) Kan. Univ. Quart., IX, pp. 283-254, 1900 (Rogers); (2) Kan. Univ. 
Sci. Bull. (continuation of the Quarterly), I, pp. 163-181, 1902 (Beede); (38) do., 
II, pp. 459-473, 1904 (Beede and Rogers); (4) do., III, pp. 877-388, 1906 (Beede and 
Rogers); (5) do., in press at this writing (Beede and Rogers). 
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