PLATE l.XXXII— Continued. 



Pterinopecten filitextus. 



Page 67. 



See Plate 17. 



Fig-. 0. A. specimen showing the interior of the right valve and preserving the pallial margin of the left 



valve. Hamilton group. Onondaga creek, N. T. 

 Pig. 10. An enlargement, to three diameters, of a portion of the surface of the specimen illustrated on plate 

 17, fig. 22. 



Hamilton group. Fi-om a boulder, Pine Valley, N. Y. 



Pterinopecten dispandus. 



Page 78. 

 Fig. 11. A right valve of this species. 

 Fig. 12. A left valve. 



Chemung group. Mansfield, Pa. 



Pterinopecten nodosus. 



Pace 60. 

 Fig. 13. The imperfect left valve described, showing the characteristic nodose radii. 

 Corniferous limestone. Ohio falls. 



Pterinopecten crenicostatus. 



Page 78. 

 s,o Plate 8. 

 Fig. 14. The specimen plate 8, tig. 4, redrawn and restored in outline to show the entire form and details 

 of surface characters. 



Chemung group. Near Angelica, N. Y. 



Pterinopecten erectus. 



Page 77. 

 Fig. In. A specimen with the upper portion of the left valve broken away, showing the interior of the 



right valve. 

 Fig. 10. A left valve of medium size. 

 Fig'. 17. A large left valve. 



Chemung group. Ithaca, N. Y. 



Pterinopecten (Aviculopecten ?) stricti.-. 



Page 74. 

 See Plate 24. 

 Fig. 18. A left valve, associated with the right valve illustrated on plate 24. 

 Chemung group. Near Elmira. N. Y. 



Pterinea (Vertumnia) reproba. 



Page 106. 

 Fig. 19. A loft valve. . 



Fig. 20. The convex right valve of a larger individual than the preceding. 



Chemung group. Ithaca, N. Y. 



Aviculopecten (Pterinopecten) invalidus. 



Page 31. 

 — Plate 1. 

 Fig. 21. The loft valve, tig. IS, plate 1, drawn of natural si/o, showing- the true form and proportions. 

 Mareellus shale. Cherry Valley, N. Y. 



