PLATE XI— Continued. 

 Leiorhtnchus Newberryi Hall. 



Page 340. 

 Fig. 35. Dorsal view of a large individual, showing the general features of the shell 

 when marlved with fine plications ; the dark line extending from the beaks 

 indicates the median septum in this specimen. 

 " 36. Ventral view of a specimen with coarser plications, especially in the mesial 



depression. 

 " 37. Cardinal view of a crushed specimen, showing the doulsle character of the 

 lamellas of the dorsal valve, partially shown in Fig. 25. 

 [The figures of this species on the plate are, by mistake, placed under the head of 

 " Waverly Sandstone," while they properly belong to the Chemung 

 group.] 



