PLATE XXXIV. 



GoNIOPHOItA PEKANGULATA. 



Pnge ■i»3. 

 See Plata 42. 

 Fiffs. 1, 2. Two It'ft valves, showing the general clmracloi-s of the species. 

 Fi^. 3. A .small right valve. 



Figw. 4-6. Right, aiit<>rior ami cardinal views of a .«ipe<uinen preserving both valves. 

 S<'hoharie grit. Schoharie, N. Y. 



GONIOPIIORA ? ALATA. 



Page iiH. 

 See Plate 42. 

 Fig. 7. An imi>erfect right valve. 



Schoharie grit. Sc?ivharie, N. Y. 



NyASSA ELLIPTICA. 

 Pnge 387. 

 Fig. 8. A right valve with the shell almost entirely i-emoved, showing the muscular scars an(i hinge-line 

 as pi-eserved on the cast of the interioi-. 



Comiferous limestone. StMff"rd, N. Y. 



MODIOMORPHA CONCENTRICA. 



Page 275. 

 See Plates 35, 36. 

 Fig. 9. The right side of a small .specimen. 

 Fyf..,^lQ. A. l^Ege ^pecijiien shiiwing the anterioi' mugculfli- scar ar^d pallial line. , ^ 



MoDIOiMORPHA ? PONDEROSA. 



Page 271. 

 See Plate 3.5. 



Fig. II. A cardinal view of the specimen, with the right valve partially worn away. 

 Fig. 12. The left side of the same specimen. See plate 35, tig. 8, for another figure of the same. 

 Corniferous limestone. Clareiu-e Hollow, N. Y. 



MouiOMORPHA Schoharie. 



Pajcc 269. 

 See Plate 35. 



Fig 13. The right side of a cast showing muscular scars and pallia! line. 

 Schoharie grit. iSrhoharie, N. Y. 



MODIOMORPHA COMPLANATA. 



Pago 272. 

 See Plate 41. 



Fig. 14. A i;ast of a left valve showing muscular impressions and pallial line. 

 Comiferous limestone. Near Delaware, Ohio. 



MODIOMORPHA LINGUIFORMI8. 



Pnge 271. 



Fig. 15. The right side of the cast preserving a portion of the thickened shell, referred with some doubt to 



this species. 

 Fig. 16. A cardinal view of a cast of the interior of another spc(-imen. 

 Fig. 17. The right side of the preceding. 



Comiferous limestone. Columhwi, 0. 



