80 U.S. NATIONAL MUSEUM BULLETIN 262 



Levisoceras-- Continued 



Unklesbay, A. G., 1954: p. 649, pi. 70, figs. 17, 18. 

 Hypotype 123418 



Tanyard Fm., Threadgill Mbr. Texas 



cf. L. complanatum Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 135, 136, pi. 62, figs. 12, 13. 

 Figured and described specimens 108415a-d 



Chepultepec Dol. Alabama 



Described specimen 108416 



Gasconade Dol. Missouri 



constrictum Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 136, pi. 65, figs. 6, 7. 

 Holotype 108419 



Oneota Dol. Wisconsin 



curvatum Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 136, 137, pi. 65, figs. 10-12. 

 Holotype and paratype 108420, 108422 



Oneota Dol. Wisconsin 



Paratype 108421 



Oneota Dol. Minnesota 



ellipticum Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 138, pi. 63, figs. 7-13. 



Holotype 108423 



Gasconade - Oneota equivalent Pennsylvania 



Paratypes 108425, 108427 



Oneota Dol. Wisconsin 



Paratype 108426 



Ellenburger Ls., Gasconade Horiz. Texas 



Unklesbay, A. G., 1954: p. 650, pi. 70, figs. 6, 7. 

 Hypotypes 123419, 123420 



Tanyard Fm., Staendebach Mbr. Texas 



ellipticum ? 



Ulrich, E. O., et al., 1943: p. 138, pi. 63, figs. 5, 6. 

 Figured specimen 108424 



Oneota Fm. Wisconsin 



instabile Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 138, 139, pi. 64, figs. 1-6. 



Holotype 108428 



Gasconade Dol. Missouri 



Paratype 108429 



Chepultepec Dol. Alabama 



Paratypes 108430, 108432 



Oneota Dol. Wisconsin 



Paratype 108431 



Chepultepec Dol. Tennessee 



