PLATE XXX. 



PAGE. 



Figs. 1-4 Stricklandinia planus Foerste. 

 1-3-4. Casts of pedicle valves. 

 2. Cast of brachial valve. 

 2. a. Reconstructed interior of the brachial valve. Collinsville, Alabama. 



Fig. 5. Spirifera ( Cyrtia ) rosteeeum Hall. 



5. Cast of pedicle valve and a line indicating its convexity. Collinsville, Alabama. 



Fig. 6. Spirifera peicateeea var. radiata Sowerby. 



6. Brachial valve Cumberland Gap Teun. 



Fi,g. 7. CORNUEITES DISTANS Hall 532 



7. Collinsville, Alabama. 



Fig. 8. CORNULITES SERPUEARIUS var. CeinTONI, Hall. 



8. Collinsville. Alabama. 



Fig. 9. PlectamboniTES Transversaeis, var. Aeabamensis Foerste. 



9. Cast of pedicle valve, and a line indicating its convexity. Collinsville, Alabama. 

 Fig. 10-12. EuOMPHAEUS SINUATUS? Hall. 



JO. View of the spire conjecturally completed from the curvature of the fragment 

 found. 



11. An entirely conjectural figure of a side view based on the slight elevation of the 



spire indicated by the fragment found, but serving to indicate the actual 1 posi- 

 tion of the sinus at a ; a is a view of the sinus, the position of which is indicated 

 in figs. 10 and 11. 



12. A view from the umbilical side of a part of the fragment found. Collinsville, 



Alabama. It is an Euomphalus but probably not E. sinuatus. 



PeectamboniTES transversaeis, var. proeongata Foerste 566 



Pedicle valve and a line indicating the convexity of the same. Wildwood station, 

 Georgia 



Pleurotomaria eabrosa var. occidens, Hall. 



Collinsville, Alabama. 



Cvceonema bieix, Conrad 551 



Brown's Quarry, near New Carlisle, Ohio. 



CONUEARIA NlAGARENSIS Hall 547 



Todd's Fork, Ohio. 

 Figs. 17-18. PenTamerus ovaeis Hall. 



A finely preserved cast of a brachial valve. 



A cast of a pedicle valve. Collinsville, Alabama. 



PTERINEA. 

 Collinsville, Alabama. 



ILE^ENUS, perhaps I. Ioxus Hall. 

 Fragment of a glabella; possible outlines indicated. Collinsville, Alabama. 



Loxonema (cf Holopeeea) subueata ? Conrad 556 



The stride partly preserved on the last coil. Todd's Fork, Ohio. 



Strophomena (Amphistrophia ?) PATENTA Hall 569 



22. Fragment, brachial valve, its origiml outlines restored. Collinsville, Alabama. 

 Figs. 23-24. Rhynchonelea Janea Billings. 



23 a. Inner cast of a brachial valve. 



23. b. Inner cast of a pedicle valve. 



24. Side view of an inner cast. Collinsville Alabama. 



Fig. 25. Orthoceras (Cycloceras) Nova-Careiseense Foerste 545 



25. A section of the siphon. Brown's Quarry near New Carlisle, Ohio. 



Fig. 26. Orthoceras ( KiON)CERAS ) Crawfordi Foerste 546 



26 A vertical section showing the si jhon. SoMiers' Home near Davton, Ohio. 



Fig. 



13. 





13. 



Fig. 



14. 





14. 



Fig 



15. 





15. 



Fig. 



16. 





10. 



Figs. 17 





17. 





18. 



Fig. 



19. 





18. 



Fig. 



20. 





20. 



Fig. 



21. 





21. 



Fig. 



22. 



