IU Sul RAE O LN Se 
Puiate 1. Figs. 1-3. Mojsisovicsia durfeldi Steinmann aoe 
4-9. Buchiceras bilobatum Hyatt | oA 
10-14. Roemeroceras syriaciforme | EPS ae 2 WAN ae Re Dee ELS NamerED & = 
15. Roemeroceras attenuatum (Hyatt) 
II. Figs. 1-3. Roemeroceras gabbi Hyatt 
4=GueRoemerocerasisubplanuma Ely atts aoe eee eesti esse elaine eel 256 
7-11. Paratissotia serrata (Hyatt) 
III. Figs. 1-6. Paratissotia regularis Hyatt 55 
. AB, Soatmeslizensslematsse, (Comme) se 
IV. Figs. 1,2. Sphenodiscus pleurisepta (Conrad) ..----.------------------------------ 260 
V. Figs. 1-3. Sphenodiscus pleurisepta (Conrad) : 262 
4. Sphenodiscus stantoni Hyatt eae ast alae ot aaa ar ras 
VI. Figs. 1,2. Sphenodiscus lobatus (Tuomey) 
3,4. Sphenodiscus beecheri Hyatt 264 
SB, Carhemediigona simian ieiyeine 9 Pe i 
6. Sphenodiscus pleurisepta (Conrad) 
VII. Figs. 1,2. Sphenodiscus lobatus (Tuomey) -.----------------------+---+++----------- 266 
VIII. Figs. 1, 2. Sphenodiscus lenticularis (Owen) \ an 
3-7. Sphenodiscus lenticuiaris var. splendens Hyatt [RSs Gok ec 5 game as i 
IX. Figs. 1-6. Sphenodiscus lenticularis (Owen) 
7-9: Sphenodiscus lenticularis var. mississippiensis Hyatt) 270 
10. Sphenodiscus beecheri Hyatt ’ 
11-13. Sphenodiscus lobatus (Tuomey ) 
X. Figs. 1-4. Coilopoceras novimexicanum Hyatt) ee 
5-21. Coilopoceras colleti Hyatt GeV EN ree REET AMR Te ee ze 
XI. Figs. 1. Coilopoceras colleti Hyatt 
2-6a. Eulophoceras natalense Hyatt = /-------------------------------------- 274 
7-24. Metoicoceras swalloyi (Shumard) 
XII. Figs. 1-3. Coilopoceras springeri Hyatt 
4-6. Aconeceras nisum (d?Orbigny) 
( 
. Coilopoceras grossouvrei Hyatt{ 7 BIS 
8. Sphenodiscus konincki Hyatt 
XIII. Figs. 1,2. Metoicoceras swallovi er | Peaevie eacte nel Ae) Cea: hs oe 
3-5. Metoicoceras whitei Hyatt 
