Fauna of the Morrow Group 
149 
1884. Meekella striatocostata. White, 13th Rep. Geol. Surv. Ind., p. 130, 
pi. 26, figs. 12-14. 
Coal Measures: Western part of Vigo County, Indiana. 
1892. Meekella striatocostata. Hall and Clarke, Int. to Study of Brach., 
pt. 1, pi. 17, figs. 10-13. 
Upper Coal Measures: Winterset, Iowa; Lawrence County, Kansas. 
1892. Meekella striatocostata. Hall and Clarke, Pal. N. Y., vol. 8, pt. 1, 
pi. 10, figs. 18-23; pi. IIB, figs. 20-22. 
Upper Coal Measures: Winterset, Iowa; Lawrence County, Kansas. 
1894. Meekella striatocostata. Keyes, Mo. Geol. Surv., vol. 5, p. 68’, pi. 39, 
figs, la-e. 
Upper Coal Measures: Kansas City, Missouri. 
1900. Meekella striatocostata, Beede, Univ. Geol. Surv. Kans., vol. 5, p. 
65, pi. 12, figs. 9-9c. 
Upper and Lower Coal Measures: Fort Scott, Olathe, Kansas City, 
Eudora, Lawrence, Lecompton, Topeka, Beaumont, and Grand 
Summit, Kansas. 
1903. Meekella striatocostata. Girty, Prof. Paper, U. S. Geol. Surv., 
No. 16, p. 350. 
Leadville district, Colorado.* 
Middle portion of Hermosa formation: San Juan region, Colorado. 
1909. Meekella striatocostata. Girty, Bull. U. S. Geol. Surv., No. 389, 
p. 54, pi. 6, fig. 6. 
Manzano group, Abo sandstone: Mesa del Yeso, and Abo Canyon, 
New Mexico. 
This species is represented by a single incomplete specimen. 
The characteristic, striated, angular plications are, however, 
unmistakable. The shell is above the average size and is not 
so strongly curved transversely as many individuals which have 
been referred to the species, but the specific determination is 
made with considerable confidence. 
Horizon and locality. Kessler limestone: near Brentwood, 
Arkansas (Station 144). 
PRODUCTID.^ 
Genus CHONETES Fischer 
Chonetes arkansanus n. sp. 
Plate VIII, figure U. 
Description. Shell small, a little wider than long, hinge-line 
greater than any other width of shell, outline sub-semicircular. 
The dimensions of a typical right valve are : length, 3.3 mm. ; 
width along hinge-line, 4.6 mm. ; convexity, about 1.0 mm. 
