PLATE XXVI 



PAGE 



Figs. 1-5. NUCULITES TRIQUETEB Conrad 232 



1. Small right valve. X l 1 ^. Evitts Creek. 



2. Partly exfoliated right valve. X l 1 ^. Right bank of Potomac, 



about 3 miles below Cumberland. 



3. Left valve of same specimen, showing impression of clavicular 



ridge. X 1%. 



4. Internal impression of right valve, showing clavicular ridge. X l 1 ^. 



Hill in West Virginia, about 3 miles south of Cumberland. 



5. Internal impression of right valve, distorted by pressure, showing 



impression of clavicular ridge. X l^. McCoys Ferry. 

 Romney formation, Hamilton member. 



Fig. 6. NUCULITES GRABAUI Prosser n. sp 234 



Internal impression of right valve, showing impression of strong 

 clavicular ridge. X 1%. McCoys Ferry. Romney formation, 

 Hamilton member. 

 Figs. 7, 8. NUCULITES MODULATUS Kindle 234 



7. Type specimen. 



8. Another individual. 



Romney formation, Onondaga member, Ridgeville, W. Va. 

 (After Kindle.) 



Figs. 9-12. PALJEONEILO CONSTRICTA (Conrad) 235 



9. Right valve, showing crenulations of hinge-line, fine concentric 

 striae and constriction. X l a /4- Evitts Creek. 



10. Right valve somewhat elongated by pressure, showing crenulations 



of hinge-line, fine striae and constriction. X 1%. Evitts Creek. 



11. Small right valve. X l 1 ^. Evitts Creek. 



12. Small left valve. X 1%. Williams Road, % mile east of Queen 

 I City Hotel, Cumberland. 



Romney formation, Hamilton member. 

 Figs. 13-15. PAL^ONEILO PLANA Hall 237 



13. Left valve, showing hinge crenulations. X 1%. Evitts Creek. 



14. Small right valve, showing hinge crenulations. X 2. Evitts 



Creek. 



15. Right valve. X 1%. Right bank of Potomac, about 3 miles 



below Cumberland. 



Romney formation, Hamilton member. 



Fig. 16. PAL^ONEILO MAXIMA (Conrad) (?) 238 



Left valve with strong sulcus. Romney formation, Hamilton mem- 

 ber, Evitts Creek. 



Fig. 17. PAL^ONEILO MAXIMA (Conrad) 238 



Right valve with greater height than usual. Hamilton formation, 



New York. 

 Figs. 18-21. PAL^ONEILO FECUNDA Hall 239 



18. Left valve showing concentric striae, X l 1 ^, and above that, a 



portion of the surface bordering the hinge-line enlarged 3 times. 

 Williams Road, !/4 mile east of Queen City Hotel, Cumberland. 



19, 20. Right valves. 



21. An enlargement of the surface striae from fig. 20. 



Romney formation, Hamilton member (figs. 19-21 after Hall). 

 Figs. 22, 23. PAL.EONEILO PERPLANA VAR. GRABAUI Prosser n. var 240 



22. Squeeze of external impression of right valve. 



23. Surface of same. X 4. 



Romney formation, Hamilton member, Evitts Creek. 



109 



