PLATE XXVI. 
Limoptera cancellata. 
Page 244. 
See Plate 92. 
Pig. 1. The left valve of a specimen. Another figure of this valve is given on plate 92, fig. 3. 
Fig. 2. The right side of the same. The pallial line and muscular impression are visible in eachvahe 
but are not represented in the figure. 
Fig. 3. A cardinal view, showing at a, a', the filling of the umbonal adductor muscular attachment where 
the pallial line terminates. 
Fig. 4. An enlargement of the surface from the left valve. 
Hamilton group. Falls of the Ohio. 
Limoptera pauperata. 
Page 243. 
Fig. 5. View of an imperfect left valve. The radii on the wing and posterior side of the body are not 
made sufficiently distinct. 
Upper Helderberg group. Stafford, Genesee Co., N. Y. 
Limoptera macroptera. 
Page 246. 
See Plates 24, 27, 28, 29 and,92. 
Fig-s. 6, 7. Two left valves showing the striations of the hinge area. 
Hamilton group. Madison Co., N. Y. 
Fig. 8. The profile of a small specimen which has been laterally compressed, giving more than the natural 
rotundity. 
Hamilton group. Cazenovia, N. Y. 
Fig. 9. A view of the left valve showing fewer and stronger radii than usual. 
Limoptera obsoleta ? 
Page 249. 
See Plates 29 and 92. 
Fig. 10. A view of the upper portion of the right side of a specimen, showing the-broad striated ligamental 
area of the left valve. 
Hamilton group. Cazenovia, N. Y. 
