PLATE VII—Continued. 
Aviculopecten dolabriformis. 
Page 26. 
Fig-. 21. A right valve enlarged to two diameters. The ears should show, in the figure, rays similar to 
those on the body of the valve. This figure is from the original specimen of the species. 
Chemung group. Philipsburg, N. Y. 
Aviculopecten convexus. 
Page 28, 
Fig. 22. A left valve enlarged to two. diameters. . The anterior ear should show a slight sinus in the 
margin for the byssus. 
Fig. 23. A profile of the preceding, showing the convexity of the valve. (Original of fig. 6, p. 264, Geolog. 
Rept. Fourth Dist. N. Y.) 
Chemung group. Rockville, N. Y. 
Aviculopecten signatus. 
Page 29. 
Fig. 24. A left valve enlarged to two diameters, showing the form and surface markings. (Original of 
• fig. 5, p. 264, Geolog. Rept. Fourth Dist. N. Y.) 
Chemung group. Rockville, N. Y. 
Lyriopecten Polydorus. 
Page 50. 
Fig. 25. The left valve described. The byssal sinus should be deeper than represented. 
Chemung group. Caasadaga, N. Y. 
Lyriopecten tricostatus. 
Page 48. 
See Plates 4 and 10. 
Fig-. 26. An enlargement to two diameters of a portion of the surface of a specimen of this species. 
Chemung- group. Near Elmira, N. Y. 
Aviculopecten tenuis. 
See Plate 81. 
Fig. 27. A left valve, showing the form ‘and surface markings. . The specimen also shows the muscular 
impression and pallial line. 
Chemung group. Randolph, N. Y. 
Fig. 28. A larger specimen of the same. Another figure is given on plate 81, showing more clearly 
the characters of thfc species. 1 ' 
Chemung group. Near Salamanca, N. Y. 
Aviculopecten celsus. 
Page 23. 
Figs. 29, 30. A right valve, natural size and enlarged. 
Chemung group. Salamanca, N. Y. 
Aviculopecten ellipticus. 
Page 25. Ii; 
Fig. 31. A nearly entire left valve of this species.. ; 
Chemung group. Meadville, Pa. 
Aviculopecten patulus. 
Page 24. 
Fig. 32. A small right valve as obtained from the impression in the matrix. The ears are partially 
restored in the figure. 
Chemung group. Salamanca, N. Y. 
Fig. 33. A large left valve, showing the characters of the shell as obtained from an impression in a fine 
conglomerate. The hinge-line-should be represented as straight. 
Chemung group. Near Salamanca, N. Y. 
