PLATE XXV. 



AcTIXOPTF.RTA EXIMIA. 

 Page 107. 

 Fig. 1. A left valve somewhat imperfect on tin- winy but showing tin- form of the body and surface 

 ornamentation. 



Schoharie grit. Schoharie, X. Y. 



Leptodesma disparile. 



Page 186. 

 See Plate 89. 

 Figs. 2, 3. Two right valves. The wing margin of tig. 2 should be sinuate to correspond with fig. 'i. 

 Fig. 4. A left valve. 



Chemung group. ilcKean Co.. Pa. 



Leptodesma curvatum. 



Page 196. 

 Fig. 5. The left valve described. 



Chemung group. McKean Co., Pa. 



