DESCRIPTIONS 01' SPECIES. 279 



crassa and D. Icaskashlensis than that it is allied to Orthothetes inaequaUs, and I am 

 prepared to believe that it is probably conspecific with the strophomenoids from the 

 Eico. Crested Butte, and other areas. 



Locality and horizon. — San Juan region (stations 2379, 2381, 2382, 2384, 2386); 

 Ouray limestone. Crested Butte district (station 2356); Leadville limestone. Lead- 

 ville district (station 2377?); Leadville limestone. Canyon (station 2366?); Millsap 

 limestone. Castle Rock quadrangle (station 2367?); Millsap limestone. Pebbles 

 of Millsap limestone (?) in the Red Beds conglomei-ate, Larimer County (station 

 236i). 



CHONETES Fischer de Waldheim, 1830. 

 Chonetes illinoisensis Worthen. 



1858. Chonetes locjani. Hall, Geol. Surv. Iowa, vol. 1, pt. 2, p. 598, pi. 12, lig.s. Xu-e, 2. (Not V. loyani 

 K and P., 1855.) 



Burlington limestone: Burlington, Iowa; Quincy, 111. 

 1860. Clionetes illinoiiensis. Worthen, Acad. Sci. St. Louis, Trans., vol. 1, p. 571. 



Crinoidal Mountain limestone: Quincy, 111. 

 186.3. Chimetes illinoisemin. Winchell, Acad. Nat. .Sci. Pliiladelphia, Proc, p. 5. 



Yellow sandstone and Burlington limestone: Burlington, Iowa. 

 1865. Chonetes UlinoUensis. AVinchell, Acad. Nat. Sci. Philadelphia, Proc, p. 116. 



Marshall group: Rockford, Ind.; Licking County, Ohio. 



Burlington limestone: Burlington, Iowa. 

 1868. Choneiet illinoisensis. Meek and \\'orthen, Geol. Surv. Illinois, Rept., vol. 3, p. 505, pi. 15, 

 figs. 8a, h. 



Burlington limestone: Jersey County, 111.; Burlington, Iowa. 



Kinderhook group: Wassonville, Iowa. 

 1870. Chnneies illinoisensis. Winchell, Am. Phil. Soc, Proc, vol. 11, p. 251. 



Waverly group: Rockville, Ohio. 

 1877. Chonetes loganensiit. Hall and Whitfield, U. S. Geol. Expl. 40th Par., Rept., vol. 4, p. 2.53, pi. 4, 

 fig. 9. 



Waverly group: Logan Canyon, AVasatch Range, Utah. 

 1888. Chonetes illinoisensis. Herrick, Sci. Lab. Denison Univ., Bull., vol. 3, p. 35, pi. 3, fig. 21. 



Waverly group: Licking County, Ohio. 

 1890. Chonetes illinoisensis. Herrick, Geol. Soc. Am., Bull., vol. 2, p. 48, pi. 1, tig. 16. 



Keokuk: Scioto County, Ohio. 

 1895. Chonetes illinoisensis. Keyes, Missouri Geol. Surv., vol. 5, p. 53. (Date of imprint, 1894.) 



Lower Burlington limestone: Louisiana and Ash Grove, Mo. 

 1899. Chonetes illinoisen.'sis. Weller, Acad. Sci. St. Louis, Trans., vol. 9, p. 15, pi. 4, fig. 10. 



Vermicular sandstone: North view, Webster County, Mo. 



1899. Chonetes loganensis. Girty, U. S. Geol. Surv., Mon., vol. 32, pt. 2, p. 525, pi. 68, flgs. 5n to 5c. 

 Madison limestone: Yellowstone National Park. 



1900. Chonetes illinoistiisis. Weller, Acad. Sci. St. Louis, Trans., vol. 10, p. 67, pi. 1, flg. 14. 

 Chonopectus sandstone: Burlington, Iowa. 



1901. Chonetes sp. of. C. illinoisensis. Weller, Acad. Sci. St. Louis, Trans., vol. 11, p. 151. 

 Kinderhook: Bed 3, Burlipgton, Iowa. 



