126 U.S. NATIONAL MUSEUM BULLETIN 262 



Slocomoceras 



retrorsum Foerste 



Foerste, A. F., 1930b: p. 86, 87, pi. 15, figs, la, b, 2a, b, 3a-c, 

 4,5. 

 Holotype and paratypes 81442, 81442a-d 



Port Byron Dol. Illinois 



Smithvilloceras 



thompsoni Ulrich, Foerste, and Miller 



Ulrich, E. O., et al., 1943: p. 155, pi. 62, figs. 7-11. 



Holotype and paratypes 108471a-c, 108472 



Smithville Fm. Arkansas 



Solenocheilus 

 ? sp. 



Girty, G. H., 1915b: p. 129, pi. 5, fig. 10. 



Figured specimen 119605 



Batesville Ss. Arkansas 



Spyroceras 



cf. S. anellus (Conrad) 



Foerste, A. F., 1935: p. 25, pi. 11, fig. 6. 

 Figured specimen 90904 



Big Horn Fm., Lander Ss. Mbr. Wyoming 



baffinense (Schuchert) 



Miller, A. K., et al., 1954: p. 59-61, pi. 24, figs. 1-4; pi. 25, figs. 

 1-9; pi. 26, figs. 1-8; pi. 27, figs. 1-8; pi. 44, figs. 9, 10; text- 

 fig. 2. 



Hypotypes (pi. 27, fig. 8 124576, 124580, 124602, 



not located) 124603, 124616, 124633 



Upper Ordovician Baffin Island, Canada 



barbense Foerste 



Foerste, A. F., 1936a: p. 40, 41, pi. 23, figs. 5, 6. 

 Holotype and paratype 92791, 92791a 



Gascons Fm. Quebec, Canada 



bilineatum (Hall) 



Bassler, R. S., 1919: p. 325, 326, pi. 51, fig. 3. 

 Hypotype 66163 



Martinsburg Sh. Pennsylvania 



