124 University of Kansas Geological Survey. 
6. Roudaria? quadrans Cragin. 
7. Mactra antiqua Cragin. 
8. Anchura Kiowana Cragin. 
9. Trochus texanus Roemer. 
10. Schlenbachia peruviana von Buch. 
ll. Avicula belviderensis Cragin. 
12. Avicula leverettc Cragin (?) 
13. Trigonia emoryi Conrad. 
14. Cardita belviderensis Cragin. 
15. Cardium (Protocardia) texanum Con. 
16. Turritella, sp. cf. sertatim — granulata Roem} 
About three miles south of Stokes’ hill is the locality known as 
Hell’s Half Acre, on Elk creek, in the northeastern part of Comanche 
county. Adjoining is a steep hill known as Black Hill, which is 
the locality fist visited and described by Professor Cragin in 1885.? 
The black shales so well exposed around the base of this hill, be- 
long to the same part of the Kiowa formation as the black paper- 
shales described by Professor Hill and the writer in the Stokes’ hill 
section. For this part of the Kiowa Professor Cragin has proposed 
the name Black Hill shale, describing it as a terrane consisting ‘of 
«a bed of black carbonaceous clay-shale 15 or 20 feet thick, resting 
upon the Comanche shell-bed.”’ Below this hill in the region 
designated Hell’s Haif Acre are excellent exposures of the Cheyenne 
sandstones showing irregularities of outcrop due to differences in 
the erosion of the sandstones. Professor Cragin has admirably 
described this locality and named some of the more conspicuous 
sandstone columns the “Chimney rock,’ and the row of six small 
pillars the “Cheyenne Brothers.”? 
The view of an Hroded ledge of Cheyenne sandstone—Plate X V— 
gives an excellent idea of the appearance of a part of the ledge of 
Cheyenne sandstone at this locality, near the Barber-Comanche 
county line, eight miles southeast of Belvidere. One of the piltfars 
shows conspicuously near the right hand side of the picture, while 
the rough and jagged nature of a portion of the ledge is fairly well 
T. W. Stanton, American Journal Science,; Vol. L, Sep. 1895, p. 218. 
EF. W. Cragin, Bulletin Washburn College Laboratory Natural History, vol. I, 
1M 
co 
p. 
W. Cragin, American Geology, vol. XVI, p. 380. 
1 
2 
0. 
3 
4 Ibid., p. 366. 
