PLATE XXVI. 



LlJIOl'TEKA CANCELLATA. 



Page 244. 



See Plate 92. 



Fig-. 1. TiM" li'it valvi' oi .1 spi-ciim-ri. Another fi<^iire of this valve is given on plate 92, fig. 3. 



Fifr. 2. The riirht side of the same. The jiallial line and mu.sc-iilai' imin-ession are visible in each val\c 



lint are not repre.setited in the figure. 

 Fig. 3. A carilinal view, showing at a, a', the filling of the nmbonal adductor muscular attachment where 



the pallial line terminates. 

 Fig. -1. An enlargement of the snrfjice from the left valve. 

 Hamilton group. Falls of the Ohio. 



LlMOlTERA PAUPERATA. 



Page .;43. 

 Fig. 5. View of an impei-fect left valve. The radii on the wing and posterior side of the body are not 

 made sufficiently distinct. 



Upper Helderberg gi-onp. ^Stafford, Genexee Co., N. Y. 



LiMOPTERA MACROPTERA. 



Page 246. 

 8ee Plates 24, 27, 28, 29 and 92. 

 Figs. (>, 7. Two left valves .showing the striatious of the hinge area. 



Hamilton group. Madison Co., N. Y. 

 Fig. S. The profile of a small specimen which has been laterally iiiiiii)ri-.<.si-d, giving more than the natural 

 rotundity. 



Hamilton group. Cazerutvia, N. Y. 

 Fig. 9. A view of the left valve showing fewer an<l stronger radii than u.sual. 



Ll-UOFIERA OBSOLETA? 



Page 249. 



See Plates 29 and 92. 



Fig. 10. A view of the upper portion of the light side of a specimen, .showing the broad striat«d ligamental 



area of the left \alve. 



Hamilton group. Cazenovia, N. Y. 



