56 U.S. NATIONAL MUSEUM BULLETIN 262 



Diestoceras - - Continued 

 shideleri Foerste 



Foerste, A. F., 1924: p. 266, 267, pi. 27, figs, la, b. 

 Holotype 81286 



Richmond Fm., Whitewater Mbr. Ohio 



walcotti Foerste 



Foerste, A. F., 1935: p. 66, 67, pi. 12, figs. 7-9. 

 Holotype 90934 



Fremont Fm. Colorado 



Discitoceras 



texanum Miller and Youngquist 



Miller, A. K., and Youngquist, Walter, 1948: p. 654, 655. pi. 64, 

 fig. 6. 

 Holotype 112986 



Barnett Fm. Texas 



Discoceras 



aff. D. canadense (Whiteaves) 



Miller, A. K., et al., 1956: p. 116, 117, pi. 58, fig. 7; text-fig. 17. 



Figured specimen 124665 



Upper Ordovician Sh. Baffin Island, Canada 



sp. 



Miller, A. K., et al., 1954: p. 117, 118, pi. 58, figs. 8-10; text-fig. 18. 



Figured specimen 124610 



Upper Ordovician Sh. Baffin Island, Canada 



Discosorus 



austini Foerste 



Foerste, A. F., 1934: p. 174, 175, pi. 34, figs, la, b, 4a-c; pi. 35, 

 fig. 5; pi. 37, fig. 4. 

 Holotype andparatypes 89824. 89825, 81921a. b. 



Clinton Gr., Dayton Ls. Mbr. 81922 



Ohio 



conoideus Hall 



Whitefield, R. P., 1882: p. 299, pi. 20, fig. 6. 

 Hypotype 136801 



Niagara Gr. Wisconsin 



? lyonsense Foerste 



Foerste, A. F., 1934: p. 178, 179, pi. 34, figs. 2a, b. 

 Holotype 7786 



Hopkinton Dol. Mbr. Iowa 



