PLATE LXXV— Contlnuml. 



PaKACVCLAS ? I'AUPEU. 



ruga M& 



See Plate 95. 



Fig. 24. A right valve, imperfectly i-epi-esented. 



Cheniunj,' fe'i-oiip. Alleghany Co., N. T. 

 Fig. 25. A Kinall left valve. See fig. 20, plate 95, for a cori-ected drawing of this specimen. 

 Fig. 26. A large right valve. 



Chemung gi-oup. Ntxir Olean, N. F. 



SCHIZOnUS CONTRACTUS. 



Page 451. 

 Figs. 27, 28. Two right valves enlarged to two diameters, showing the foim and surface markings. 

 Hamilton group. Shore of Cayuga lake, N. Y. 



SCHIZODUS CUNEUS. 

 Page 438. 

 Fig. 29. A right valve of this species. 



Waverly group. Qraninlk, Ohio. 

 Fig. 30. A right valve referi-ed to this species with doubt. 

 Waverly group. Orunville, Ohio. 



fcjcuizoDus Chemungensis, var. (Juadranoulakis. 



Page 4M. » 



Fig. 31. A cast of the interior of a small left valve, showing muscular scars and pallial line. 



Lower Chemung s'"0"P- Ithaca, N. Y. 

 Fig. 32. A partial cast of a larger right \ alve. 

 Fig. 33. A left valve of erect form. 



Chemung group. Near Elviira, N. Y. 



Fig. 34. A large right valve. 



Chemung group. Tioga Co., N. Y. 

 Pig. 36. A left valve of medium size. 



Chemung group. Factoryville, Tioga Co., iV. Y. 



ScuizoDus >:qualis. 



Page 469. 

 See Plate 95. 

 Fig. 35. The left side of an imperfect specimen preserving both valves. 

 Waverly gi-oup. Licking Co., Ohio. 



ScHizoDUS Chemongensis. 



Page 453. 

 Figs. 37-40. Two right and two left valves belonging to this species. 

 Fig. 41. An imi)erfect left valve referred to this species with doubt. 

 Fig. 46. A small left valve. 



Chemung group. Cortland, N. Y. 



Edmondia rhomboidea. 

 Page tSB. 



See Plates 64, 95. 

 Fig. 42. A left valve. See plate 96, fig. 15, for a corrected drawing of this specimen. 



SCHIZODUS OBLATU8. 

 Page 456. 

 Fig. 43. A left valve. 



Chemung group. Napoli, Cattaraugus Co., iV. Y. 

 Fig. 44. The cast of interior of a right valve showing muscular scars. 

 Chemung group. Napoli, Cattaraugus Co., N. Y. 



