396 CARBONIFEROUS FORMATIONS AND FAUNAS OF COLORADO. 



SPIRIFERINA d'Orbigny, 1847. 

 Spikiferina campestuis White. 



1874. Spiriferina spinosaf. Derby, Cornell Univ., (Science) Bull., vol. 1, No. 2, p. 23, pi. 6, figs. 



S, 13, 14. 

 Coal Measures: Itaituba, Brazil. 

 1S74. Spiriferina spinosa var. campesirin. White, U. S. Geog. Geol. Surv. W. 100th Mer., Prelim. Hept. 



Invert. Foss., p. 21. 

 Carboniferous Coal Measures: Near Santa F^, N. Mex. ; Camp Cottonwood, Lincoln County, Nev. 



1875. Spiriferina octoplicata. White, U.S. Geog. Geol. Surv. W. 100th Mer., Eept., vol. 4, p. 139, 



pi. 10, figs. 8a-c. (Whole volume published in 1877.) 

 Carboniferous: Near Santa F^, N. Mex.; Camp Cottonwood, Lincoln County, Nev. 

 1877. Spiriferina sp. undet. Meek, TJ. S. Geol. Expl. 40th Par., Kept., vol. 4, p. 84, pi. 8, fig. 5, 5a, 5b. 



Carboniferous limestone: Railroad Canyon, Diamond Mountains, Nevada. 

 1877. Spiriferina gonionota. Meek, ibidem, at end of description (p. 85). 



Carboniferous limestone: Railroad Canyon, Diamond Mountains, Nevada. 

 1884. Spiriferina cristata. Walcott (pars), U. S. Geol. Surv., Mon., vol. 8, p. 218, pi. 18, fig. 13 (not 

 fig. 12). 

 Lower Carboniferous: On the east slope of a small conical hill on the east side of Secret-Canyon- 



road Canyon, Eureka district, Nevada. 

 Upper Carboniferous limestone: Western slope and foothills of Diamond Peak, Eureka district, 

 Nevada. 

 1896. Spiriferina cristata. Smith (pars), Am. Phil. Soc, Proc, vol. 25, p. 242. 



Lower Coal Measures: Conway County, Ai-k., SW. i of NW. J of sec. 29, T. 6 N., R. 16 W. 

 Upper Coal Measures: Sebastian County, Ark., sec. 12, T., 8 N., R. 32 W. 

 Poteau jNIountain, Indian Territory. 

 1896. Spiriferina cristata. Smith (pars), Leland Stanford Junior Univ. PubL; Cont. Biol. Hopkins 

 Seaside Lab., No. 9, p. 32. 

 Lower Coal Measures: Conway County, Ark., SW. } of NW. i of sec. 29, T. 6 N., R. 16 W. 

 Upper Coal Measures: Sebastian County, Ark., sec. 12, T. 8 N., R. 32 W. 

 Poteau Mountain, Indian Territory. 



The presence in our Upper Carboniferous faunas of members of the genus 

 Spiriferina possessing two quite different types of surface ornamentation has been 

 long, though imperfectly, known. One type which is much the more common has 

 the ribs crossed by numerous fine, concentric, lamellose, imbricating strife or crenula- 

 tions. It was for a widely distributed representative of this division that Shumard 

 proposed in 1855 the specific name Spiriferina kentuckyensix.'^ In the other type, 

 which is rarer, the concentric markings are comparative Ij^ inconspicuous and the 

 surface is more or less abundantly covered with postules or short spiniform projec- 

 tions. For a species of this type Meek suggested, in 1877, the name Spiriferina 

 gonionota,^ although, as the sui'face ornamentation of his typical specimen was not 

 shown, he laid stress rather upon other characters in discriminating it from the 



CI First and Second Ann. Kept. Geol. Surv. Missouri, pt. 2, p. 203. 



iU. S. Geol. E.xpl. 40th Par., Rept, vol. 4, 1S77, p. 84, pi. 8, figs. 5, Sa, 6b. 



