ProsseR.|  Cretaceous.—Comanche Series of Kansas. LNG 
begins in the northeastern part of Barber county north of Medicine 
Ledge, runs northwesterly across the northern part of the county 
to the southeastern corner of Kiowa county. In Kiowa county it 
follows up the Medicine Lodge river and its branches to the vicinity 
ef their head waters, when it turns southeasterly crossing the 
northeastern corner of Comanche county and extends into the west- 
ern part of Barber county. In part of this region it has a thickness 
of from 100 to 160 feet. Then making a loup in the western part of 
Barber county it turns northwest up the ridge north of Mule creek 
into Comanche county, whence as a thin line it extends first south- 
west and then northwest across the central part of the county, and 
then in a very irregular line nearly across the central part of Clark 
county, disappearing not far southwest of the Great Basin. In the 
southern part of Comanche county south of Avilla is an isolated 
area Which has been separated by the erosion of Salt Fork valley 
from that of the more northern area. 
In only a portion of this region does the series attain a thickness 
of more than 20 feet; and its whole extent may be conveniently 
divided into three such areas, as follows: the Kiowa-Barber-Co- 
manche; the southern Comanche, and the Clark. he local details 
Git thickness, lithologic characters, and sections will consequently 
be given under the above headings. 
KIOWA-BARBER-COMANCHE ARHA. 
This includes that part of the Comanche series found in the west- 
ern and northwestern part of Barber county; in the northeastern 
part of Comanche and the southeastern portion of Kiowa county, 
which in many respects is the classic part of the field since it was 
first discussed here by Cragin and later he and Hill described it 
fully. Again the series reaches its maximum thickness in southern 
ICansas in the Belvidere region, and both the Cheyenne and Kiowa 
formations are well developed. 
Mr. Gould found Kiowa shells six miles northeast of Medicine 
Lodge which is the fartherest east that he found them south of the 
Arkansas river; and again he found them four miles northeast of 
Sun City. Professor Cragin has reported several of the Kiowa 
species as imbedded in “the basal calcareous conglomerate of the 
Tertiary in the border of the upland north of Sharon,” which is 
