PLATE LXXV—Continued. 
PARACYCLAS ? PAUPER. 
Page 416. 
See Plate 95. 
Fig. 24. A right valve, imperfectly represented. 
Chemung group. Alleghany Co., N. Y. 
Fig. 25. A small left valve. See tig. 20, plate 95, for a corrected drawing- of this specimen. 
Fig. 26. A large right valve. 
Chemung group. Near Olean, N. Y. 
SCHIZODUS CONTRACTUS. 
Page 451. 
Figs. 27, 28. Two right valves enlarged to two diameters, showing the form and surface markings 
Hamilton group. Shore of Cayuga lake, N. Y. 
SCHIZODUS CUNEUS. 
Fig. 
Fig. 
Page 458. 
29. A right valve of this species. 
Waverly group. Granville, Ohio. 
30. A right valve referred to this species with doubt. 
Waverly group. Granville, Ohio. 
Schizodus Chehungensis, var. QUADRANGULARIS. 
Page 454. 
Fig. 31. A cast of the interior of a small left valve, showing muscular scars and pallial line. 
Lower Chemung group. Ithaca, N. Y. 
Fig. 32. A partial cast of a larger right valve. 
Fig. 33. A left valve of erect form. 
Chemung group. Near Elmira, N. Y. 
Fig. 34. A large right valve. 
Chemung group. Tioga Co., N. Y. 
Fig. 36. A left valve of medium size. 
Chemung- group. Factoryville, Tioga Co., N. Y. 
Schizodus zequalis. 
Page 459. 
See Plate 95. 
Fig. 35. The left side of an imperfect specimen preserving both valves. 
Waverly group. Licking Co., Ohio. 
Schizodus Chemungensis. 
Page 453. 
Figs. 37-40. Two right and two left valves belonging to this species. 
Fig. 41. An imperfect left valve referred to this species with doubt. 
Fig. 45. A small left valve. 
Chemung group. Cortland, N. Y. 
Edmondia rhomboidea. 
Page 386. 
See Plates 64, 95. 
Fig. 42. A left valve. See plate 95, fig. 15, for a corrected drawing of this specimen. 
Schizodus oblatus. 
Fig. 
Fig. 
Page 455. 
43. A left valve. 
Chemung group. Napoli, Cattaraugus Co., N. Y. 
44. The cast of interior of a right valve showing muscular scars. 
Chemung group. Napoli, Cattaraugus Co., N. Y. 
