L’LATK LXXII — Continued. 
Paracyclas elliptica. 
Page 440. 
See Plate 95. 
Fig-. 23. The left side of a specimen. 
CoiTiiferous limestone. Clarence, N. Y. 
Fig-. 24. The right side of a cast. 
Corniferous limestone. Coly/mh%s, Ohio. 
Figs. 25, 26. Left side and cardinal views of a specimen which is vertically compressed. 
Corniferous limestone. Leroy, N. Y. 
Figs. 27, 28. The right side and cardinal view of the cast of the interior, showing muscular scars, pallial 
line and ligamental grooves. 
Corniferous limestone. Cayuga, Ontario. 
Fig. 29. The left side of a large specimen. 
Corniferous limestone. Western New York. 
Fig. 30. The right side of a specimen, narrowed by compression. 
Corniferous limestone. Leroy, N. Y. 
Figs. 31-33. Left, right and cardinal views of an individual, retaining the shell and showing the surface 
characters. 
Hamilton group. Falls of the Ohio river. 
Paracyclas ignota. 
Page 444. 
Fig. 34. A right valve of this species. 
Chemung group. Meadville, Pa. 
SCHIZODUS ? FISSA. 
Page 447. 
Figs. 35, 36. The right side and cardinal views of a cast of the interior. 
Schoharie grit. Schoharie, N. Y. 
Fig. 37. The right side of a compressed specimen. 
Schoharie grit. Schoharie, N. Y. 
Figs. 38-40. Right, left and cardinal views of a cast of the interior, showing muscular impressions. 
Schoharie grit. Schoharie, N. Y. 
Fig. 41. The right side of a cast showing anterior and posterior muscular scars. 
Schoharie grit. Schoharie, N. Y. 
