PLATE XXVIII. 



LiMOPTERA CUKVATA. 



Page 250. 

 Fig. 1. A large loft valve showing- the anteiior ciirvatui-e of the beak and the alternation of the radii. 

 Fip. 2. An internal cast of a left valve showing- the inler-pallial area covered with small imstules which 

 were ajiparently the points of attachment for umbonal muscles. The spei-inien shows the pal- 

 lial line and muscular impression. 

 Fig. 3. The left valve of a large specimen, showing the wing and some ti-aces of the i-adii. ITio post-basal 

 margin is not snftii-i«'ntly extended in the figure. 

 Il.-uiiiltim group. Madhon Co., N. ¥. 



LiMOPTERA MACROPTEIiA. 



Page HI': 



See Plates 24, 26, 27, 29 and 02. 



Fig. 4. Till- I'ight side of a, laterally compressed specimen, representeil on pi. 27, tig. 9, and pi. 29, fig. 2. 



The umbonal scar is here shown in its true po.sition. 

 Fig. a. The left side of aii unusually elongate spe<-imen, due in ]>art to tlio l)reaking away of the margin 

 of the left valve to the margin of the right valve. 

 Hamilton group. Madison Co., N. Y. 



