32 U.S. NATIONAL MUSEUM BULLETIN 262 



Centrotavphyceras — Continued 



vellvillense Ulrich, Foerste, Miller, and Unklesbay 



Ulrich, E. O., et al., 1942: p. 55, 56, pi. 14, fig. 4; pi. 30, fig. 1; 

 pi. 55, figs. 1-3. 

 Holotype and paratypes 101393, 101394 



Powell Fm. Arkansas 



cf. C. vellvillense Ulrich, Foerste, Miller, and Unklesbay 



Ulrich, E. O., et al., 1942: p. 55, 56, pi. 27, fig. 6. 

 Figured specimen 101392 



Smithville Fm. Arkansas 



Chadwickoceras 



erectum Foerste 



Foerste, A. F., 1930b: p. 96, pi. 18, figs. 2a, b. 

 Holotype 81448 



Port Byron Dol. Illinois 



Charactoceras 



baeri (Meek and Worthen) 



Foerste, A. F., 1924: p. 235-239, pi. 31, fig. 1; pi. 32, figs, la, b, 

 pi. 34, figs, la, b; 2. 

 Hypotypes 81288 



Richmond Fm., Whitewater Mbr. Ohio 



? canyonense Foerste 



Foerste, A. F., 1935: p. 84, 85, pi. 22, figs. 1-5. 

 Syntypes 90950, 90951 



Fremont Fm. Colorado 



schucherti Foerste 



Foerste, A. F., 1928a: p. 61, 62, pi. 9, figs. 2a-c; pi. 27, figs. 4a-d. 



Holotype (Eurystomites plicatus ? 



Whiteaves in Schuchert, 1900) 28123 



Trenton age Baffin Land, Canada 



Miller, A. K., et al., 1954: p. 113-115, pi. 49, fig. 3; pi. 56, figs. 



1-4. 

 Hypotypes 124669, 124686 



Upper Ordovician Sh. Baffin Island, Canada 



Chara c t oc erina 



kirki Foerste 



Foerste, A. F., 1935: p. 86-88, pi. 20, figs. 1-4. 

 Holotype 90952 



Big Horn Fm. Wyoming 



