182 
Kirtley F. Mather 
1865. Spirifer Subventricosa. McChesney, 111. New Spec. Foss., pi. 1, 
figs. 4a--b. 
1868. Spirifer opimus. McChesney, Trans. Chicago Acad. Sci., vol. 1, p. 
35, pi. 1, figs. 4a-b. (Not S. opimus Hall, 1858). 
Coal Measures: Big Creek, near New Harmony, Indiana. 
1874. Spirifera opima. Derby, Bull. Cornell Univ. (Science), vol. 1, No. 
2, p. 15, pi. 1, fig. 4; pi. 2, fig. 7; pi. 4, fig. 12. 
Coal Measures: Bomjardim, Paradao, and Itaituba, Brazil. 
1875. Spirifer (Trigonotreta) opimus? Meek, Pal. Ohio, vol. 2, p. 329, 
pi. 19, figs. 14a-e. 
Coal Measures: Ohio; Illinois; Iowa; Missouri; West Virginia; and 
Rocky Mountains. 
1876. Spirifer rockymontanus. White, PowelTs Rep. Geol. Uinta Mts., 
p. 90. 
Lower Aubrey group: Split Mountain Canyon and near Echo Park, 
Utah. 
Upper Aubrey group: Beehive Point, near Horseshoe Canyon, Utah. 
1877. Spirifer {Trigonotreta) opimus? Meek, U. S. Geog. Expl. 40th Par., 
vol. 4, p. 88, pi. 9, fig. 6. 
Carboniferous limestone: Six miles south of Promontory Station, 
Promontory Mountains, Railroad Canyon, Moleen Peak; Mount 
Nebo in Utah; Fossil Hill, White Pine District. 
1877. Spirifer rockymontanus. White, U. S. Geog. Surv. west of 100th 
Merid., vol. 4, p. 134, pi. 11, figs. 9a-d. 
Carboniferous: North Fork of Lewiston Canyon, Oquirrh Range, 
and on west face of Oquirrh Range, Utah; near Santa Fe, New 
Mexico. 
1887. Spirifer opima. Herrick, Bull. Sci. Lab. Den. Univ., vol. 2, p. 44, 
pi. 2, fig. 23. 
Coal Measures: Flint Ridge, Ohio. 
1888. Spirifera rockymontana. Keyes, Proc. Acad. Nat. Sci., Phil., p. 231. 
Lower Coal Measures: Des Moines, Iowa. 
1894. Spirifera rockymontana, Keyes, Mo. Geol. Surv.„ vol. 5, p. 84. 
Upper Coal Measures: Kansas City, Missouri. 
1897. Spirifer rockymontanus. Smith, Proc. Am. Phil. Soc., vol. 35, 
p. 32. 
Lower Coal Measures: White and Crawford Counties, Arkansas. 
1899. Spirifer rockymontanus. Girty, 19th Ann. Rep. U. S. Geol. Surv., 
pt. 3, p. 578. 
Upper Coal Measures: McAlester and Atoka quadrangles, Indian 
Territory. 
1903. Spirifer rockymontanus. Girty, Prof. Paper, U. S. Geol. Surv., No. 
16, p. 383, pi. 6, figs. 4"7c. 
Hermosa formation: San Juan region and Ouray, Colorado. 
Weber limestone: Crested Butte district; Leadville district; Grand 
River region, Colorado. 
Robinson limestone: Leadville district, Colorado. 
Maroon formation (?) : Grand River region, Colorado. 
