Fig. 
Fig. 
Fig. 
PLATH XX. 
PAGE 
STROPHMODON TAY BIPARDVDAGIN aa e iain eileisies el 226 
1 A nearly complete pedicle valve. Nearpass section, Lo- 
cality 2A. 
2. The interior of an incomplete brachial valve partially ex- 
foliated. Same locality. 
3. A nearly complete pedicle valve, showing mucronate ex- 
tension of the hinge-line. Same locality. 
4, Internal cast of a pedicle valve. Same locality. 
5. Surface markings enlarged. Same locality. 
ORTHOREE TES) DECKHRENSLS a Man Seater tertile aires 229 
6. A nearly complete brachial valve, with profile in outline. 
Nearpass section, Locality 2A. 
7. A nearly complete pedicle valve. Nearpass section, Lo- 
cality SA. 
ORTHOTHETES INTERSTRIATUS (Halll)... ........:..-..- : 229 
8-9. A pedicle and a brachial valve. Nearpass section, Lo- 
cality 2A.” 
WH MVMIINVA, TIEKONMATOMOOVAIGS) (WWE co cobolocodtoecouuscads 228 
10. An incomplete pedicle valve. Nearpass section, Locality 
QvAR 
CHONETES! JERSEYENSIS Wellerie gee csssee ss oecese cee. 230 
11. A small pedicle valve. Nearpass section, Locality 8A. 
12. A large, incomplete pedicle valve, showing spine bases and 
curved ribs. Nearpass section, Locality 24.8 
13. A small pedicle valve, showing spine bases. Nearpass 
section, Locality 8 A. 
14. A similar pedicle valve. Nearpass section, Locality 2A. 
15. A large brachial valve. Same locality. 
16. A large pedicle valve. Same locality. 
PHN DAMER US CLR CUICARTSE Isis S10 yarensp etn eieiana saat ae auee ne Dae 
17-19. Three views of a nearly complete pedicle valve. Nearpass 
section, Locality 2A. 
ORTHIS| ELABELELLES! HOeCESEE a acieyeis ceeloerer eiercielion tel sted 231 
20. A nearly complete brachial valve. Nearpass section, Lo- 
cality 2AS 
DALMANELLA. POSTHLEGANDU GAN one Sp scueciieusiasicenecrrneiels 232 
21, 22. Two pedicle valves. Nearpass section, Locality 2 A.° 
and 8A. 
28,24. Two brachial valves. Nearpass section, Locality 8 A. 
(415) 
