MiEGAMBONEAS OCGEDUATIS |= a semyne cnrstnl orale a a ae ol li 
Fig. 1. Left valve. Natural size. 
ACTINOPTERTAS BOW DY (oe ooo ale oe aie ale =n alee alm aim ele lata ante aie lm eee a 
Fig. 2. Left valve. Natural size. 
TEIMOPTE RA] SAR ME NDILODA sooo late tote alee chain ycotatate lores see atin ima ene asl ie ete ieee tee ee tee et 
Fig. 3. Small left valve. Natural size. 
3a. Side view of 36. 
3b. Large left valve. Natural size. 
SANGUINOLITES ? SANDUSKYENSIS.....- 
Fig. 4. Left valve. Natural size. 
Micropon (C.) MACROSTRIATUS....-.......--- 
Fig. 5. Right valve. Natural size. e 
PTERINEAWELABE LUA cs a0 cco oe oe sonjacee motesectena seenionane seer eens = ieee ener et - 
Fig. 6. Left valve. Natural size. See plate xv, fig. 12. 
MODIOMORPHA) ‘OBLONGA! o-tecme- canis --)ssite cee: cms seas eee eee eerie See ete Sgt aracoe 
Fig. 7. Left valve. Natural size. 
SOHIZODUS! (CE) FOR BLGUUARIS foo elate terra atm ime lteter al 
Fig. 8. Cast of right valve. Natural size. 
8a. Small right valve with a more strongly-outlined postero-cardinal angle. 
WOONONA AVEIRO OT) Bee eoe a5 Bo SEED OSD Sao nob chased Sneses sabe SoS OCSSRED SEeScoOS see 
Fig. 9. Cast of right valve. Natural size. 
LILWIOPTERIA. RAWINESQUIL 22522 <6054 3-22 Secceas cseme ce Soleo ete nee eee ome cee aaa eaeeveee 
Fig. 10. Left valve. Natural size. 
10a. Small left valve. Natural size, 
NGYTIAR GAS (PEE DH ONES DEEUS)) OVO RIMES etal e cet eaael  oteel a 
Fig. 11. Cast of right valve. Natural size. 
IPTERINEA UNEWWABKIENGIS ac fomes cele onal oe satel e isis aeiotae eta at teal eee el te ole 
Fig. 12. Cast of right valve. Natural size. 
TGR PTODESMA TRANS VICRSA terse etem ete ae me ciate eee ae te 
Fig. 138. Left valve. Natural size. 
GYPRICARDINTAVINDENTA Ss ooo niece eee ne ee ene ee eee ins acelceeioemeesci= =a BoORae SeeeeS 
Fig. 14. Left valve. Natural size. See plate xv, fig. 11. 
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