190 
Kirtley F. Mather 
1888. Spirifera lineata. Keyes, Proc. Acad. Nat. Sci., Phil., p. 230. 
Lower Coal Measures: Des Moines, Iowa. 
1891. Spirifer (Martinia) lineata. Whitfield, Ann. N. Y. Acad. Sci., vol. 
5, p. 603, pi. 16, figs. 3-5. 
Coal Measures: Hocking County, Ohio. 
1894. Spirifera perplexa. Keyes, Mo. Geol. Surv., vol. 5, p. 84. 
Upper Coal Measures: Kansas City, Missouri. 
1895. Spirifera (Martinia) lineata. Whitfield, Geol. Surv. Ohio, vol. 7, 
p. 48'8, pi. 12, figs. 3-5. 
Coal Measures: Hocking County, Ohio. 
1895. Spirifer lineatus. Hall and Clarke, Pal. N. Y., vol. 8, pt. 2, pi. 38, 
figs. 2, 4, 7, 8. 
Coal Measures: Iowa. 
1899. Reticularia perplexa. Girty, 19th Ann. Rep. U. S. Geol. Surv., 
pt. 3, p. 577, pi. 72, fig. la. 
Upper Coal Measures: McAlester quadrangle, Indian Territory. 
1903. Squamularia perplexa. Girty, Prof. Paper, U. S. Geol. Surv., No- 
16, p. 392, pi. 6, figs. 8-llc. 
Hermosa formation: San Juan region and Ouray, Colorado. 
Weber limestone: Crested Butte district and Leadville district, 
Colorado. 
Maroon formation: Crested Butte district, Colorado. 
Robinson limestone: Leadville district, Colorado. 
1909. Squamularia perplexa. Girty, Bull. U. S. Geol. Surv., No. 389, p. 66. 
Manzano group, Yeso formation: Mesa del Yeso. 
San Andreas formation: San Andreas, New Mexico. 
1910. Squamularia perplexa. Raymond, Ann. Carnegie Mus., vol. 7, p. 
156, pi. 24, figs. 3, 4. 
Vanport limestone: New Castle, Pennsylvania. 
1911. Squamularia perplexa. Raymond, Penn. Topog. and Geol. Surv. 
Comm., Rept. for 1908-10, pi. 3, figs. 9, 10. 
Vanport limestone: New Castle, Pennsylvania. 
1911. Reticularia perplexa. Mark, Bull. Sci. Lab. Den. Univ., vol. 16, 
p. 308, pi. 8, fig. 11. 
Mercer limestone: Bald Knob, Ohio. 
This is one of the more common species in the Morrow fauna 
and is well represented in each of the fossiliferous horizons 
of the group, being especially abundant in the Brentwood lime- 
stone. The individuals are in all stages of growth and vary 
in length from 3 to 14 mm. In shape and surface markings 
they are identical with the common Mississippi Valley form. 
Horizon and locality. Hale formation: East Mountain, Fay- 
etteville, Arkansas (Stations 136 and 149). Brentwood lime- 
stone: vicinity of Fayetteville, Arkansas (Stations 134, 135, 
138, 140, and 148) ; Sawney Hollow, Oklahoma (Station 210). 
