DESCEIPTIONS OF SPECIES. 385 



or six plications on the fold and about ten lateral ones. The cardinal extremities 

 are characteristicallj^ rounded. 



Locality aiid horizmi — San Juan region (stations 2196, 2196b, 2196c, 2202, 2222, 

 2223, 2229, 2323); middle portion of the Hermosa formation. Oura}^ (station 2195, 

 2195a, 2195b); Hermosa formation. Crested Butte district (stations 22i5, 2308, 

 .2315); Weber limestone. Leaddlle district (stations 2253, 225i, 2259, 2261, 2267, 

 2268, 2271, 2281, 2288, 2289?); base of the Weber formation and in the Eobinson 

 limestone. Grand River region (station 2288, 2289); base of Weber formation and 

 base of the Maroon formation (?). 



Spieifer camerattts Morton. 



1836. Spirifer cameratus. Morton, Am. Jour. Sci., (1), vol. 29, p. 150, pi. 2, fig. 3. 



Coal Measures: Ohio Valley. 

 1852. Spirifer (riplicata. Hall, Stansbury's Exped. Great Salt Lake, p. 410, pi. 4, figs. 5a-e. 



Carboniferous: Missouri River above Weston. 

 1852. Spirifer fasciger? Owen, Geol. Surv. Wisconsin, Iowa, and Minnesota, pi. 5, fig. 4. (Not. Sp. 

 fa-iciger Iveyserling. ) 



Carboniferous: Missouri River, near mouth of Keg Creek, and Plattsburg, Mo. 

 1852. Spirifer meusebachanus. Roeiner, Kreid. von Texas, p. 88, tab. 11, figs. 7a-c. 



Carboniferous: San Saba Valley, about 20 miles below the old Spanish forts, Texas. 

 1852. Spirifer ineqaicostatusf Owen, Geol. Surv. Wisconsin, Iowa, and Minnesota, p. 586, pi. 5, fig. 6. 

 (See specimens in U. S. Nat. Mus., Cat. Invert. Foss., 17954.) 



Carboniferous limestone of Iowa: Skunk River,? Iowa. 

 1856. Spirifer cameratus. Hall, Pacific Railroad Rept, vol. 3, p. 102, pi. 2, figs. 9, 12, 13. 



Carboniferous: Pecos Village, N. Mex. 

 1858. Spirifer sirintus var. triplicaiux. Marcou, Geol. North America, p. 49, pi. 7, fig; 3. 



[Mountain limestone]: Abundant in the Rocky Mountains, especially at Pecos Village, at Tigeras, 

 on the summit of the Sierra de Sandia, at Great Salt Lake, and at Vancouver Island. 

 1 1858. Spirifer rocbimontani (pars). Marcou, Geol. North America, p. 50, pi. 7, figs. 4-4b. 



Mountain limestone: Tigeras, N. Mex. 

 1858. Spirifer cameratus. Hall, Geol. Surv. Iowa, vol. 1, pt. 2, p. 709, jil. 28, figs. 2a, b. 



Coal Measures: Ohio; Illinois; Iowa; Missouri; Nebraska; Santa Fe and Pimas Village, N. Mex. 

 ? 1859. Spirifer cameratus. Meek and Hayden, Acad. Nat. Sci. Philadelphia, Proc, p. 27. 



Upper Coal Measures: Kansas. 

 18.59. Spirifer cameratus. Shumard, Acad. Sci. St. Louis, Trans., vol. 1, p. 391. 



Permian sandstone and AVhite limestone: Guadalupe Mountains. 

 1861. Spirifer cameratus. Newberry, Ives's Colorado River Expl. Exped., p. 127. 



Upper Carboniferous limestone: Santa Fe and Pecos Village, N. Mex. 

 1866. Spirifer cameratus. Geinitz, Carb. und Dyas in Nebraska, p. 44. 



Carboniferous limestone: Bellevue and Plattsmouth, Nebr. ; stage B, b', Nebraska City, and 

 stage B'', b. Bennetts Mill, northwest of Nebraska City. 

 1868. Spirifer. Rogers, Geol. Rei^t. Pennsylvania, vol. 2, pt. 2, p. 833, fig. 694. 



Western Coal Measures. 



14364— No. 16—03 25 



