PLATE XXXIV 



PAGK 



Figs. 1-4. CYPRICARDELLA BELLISTRIATA (Conrad) 273 



1. Right valve. Evitts Creek. 



2. Interior of left valve (?) with broken anterior end. Evitts Creek. 



3. Left valve. Evitts Creek. 



4. Cardinal view of small specimen preserving both valves. Cum- 



berland. 

 Romney formation, Hamilton member (fig. 4, after Hall). 



Fig. 5. CYPRICARDELLA TENUISTRIATA (Hall) 275 



Left valve. Romney formation, Hamilton member, Williams Road, 

 % mile east of Queen City Hotel, Cumberland. 



Figs. 6-10. CYPRICARDINIA IXDENTA (Conrad) 276 



6. Right valve. X 2. Evitts Creek. 



7. External (?) impression of right valve. X 2. 21st Bridge. 



8. A squeeze from the same specimen. X 2. 



Romney formation, Hamilton member. 



9. Right valve showing surface markings. 

 10. Left valve. 



Hamilton formation, New York. 



Figs. 11-14. PARACYCLAS LIRATA Conrad 277 



11. Right valve of small specimen. Great Cacapon. 



12. Left valve elongated by pressure. McCoys Ferry. 



13, 14. Right and left valves somewhat distorted. Western Maryland. 

 Romney formation, Hamilton member. 



Fig. 15. PARACYCLAS LIRATA Conrad var. (?) 278 



Left valve somewhat broken along the hinge line. Romney formation, 

 Hamilton member, McCoys Ferry. 



Figs. 16, 17. PARACYCLAS TENTHS Hall 278 



Interior of right valves. X IV 2 . Romney formation, Hamilton mem- 

 ber, Evitts Creek. 



Fig. 18. PAL^OSOLEX MINUTTJS Prosser n. sp 279 



Both valves, ventral margin of left broken^ X 1%. Romney forma- 

 tion, Hamilton member, Williams Road, x /i mile east of Queen 

 City Hotel, Cumberland. 



117 



