12) By/N WD) >:@>-<e 
MODIOMORPHA AMBIGUA oo oo eeiw eee eae ene eee eee eee nlase en ston eate ane seein waeeloe ee 
Fig. 1. Left valve of a slightlyorashed specimen. 
MODIOMORPHA ? PINTOENSIS eo estene soe ses cleo ne ona (nee elea ale aistele eel are tall 
Fig. 2. View of the specimen used in the description. 
MODIOMORPHAG (DESIDERATA Sen pines (neal oleae leetalesiaeelole mista seta elle ae le 
Fig. 3. Anterior portions of the right and igmeaicaes as ss dliog appear on a fragment of lime- 
stone. 
GRANIIYSTAVHANNIBATLENSIS( seo) osclenccaclee = -isen semen cele tee teen ee eee ate eee eee 
Fig. 4. View of a right valve which is a little compressed. 
GRAWOEYSTAV AR CUATAQ=e = ooo cees saaelor es soso ieee eee en ese ieee Bed ete cosono assess 
Fig. 5. Right valve found in the same beds with the pmoneding species. 
RANGUINOGLUKS) A OUUS nme ecee seee ema ens ee ete eee ese ate moe eee eee ee lee aielnetreleteteetettete 
Fig.6. Elongate form ofright valve, very closely allied to the type examples of the species. 
7,9. Right and left valves of two shells that vary in form from fig. 6. 
SCHIZODUSVCUNEATUB mcnislesienicistomtenia einioisie Seicicr sein stateless tate ee ete ate eet ere otal eto late eet ete 
Fig. 8. View of the right valve. 
SANGUINOLITES RETUSUS ..-.----..cceesecees 2200+ -- arSnengosodordce sac sasces 
Fig. 10. Right valve. The radiating ridges of the sirdben slaps Beer strong in the figure. 
SANGUINOLITES SIMPLEX -.< cavisee sive meres see ietee ateteeinaisl se ate ee ate tae a eae ee tree 
Fig. 11. View of the right valve. 
SY USER ODOOLA UU CL ISIC EAR es Gree pep BS SG UCD 2 SO00SS SCaOSO asc SodSte casted cones Ssecs6e 
Fig. 12. Right valve showing the strong radiating lines of the umbonal slope. 
os anP (OO) fs) 6 00 Ce sere Seca SEOSCOBOOO SOSSOUBOECSGS SASS HaSoOSE Nanab Soonet SenocoSS CREO SSTOOS 
Vig. 13. View of a small specimen of the left valve, with portions restored in outline, 
INU GUTAG ENS UGA RIG otal crete tees eee lett fete tae teeta esausseces 
Fig. 14. Left valve, showing general form and the tine, concentric surface striz. 
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