PLATE XLIY. 
Gomphoceras eximium. 
Page 329. 
Pig-. 1. An individual slightly compressed, preserving a large portion of the chamber of habitation and thir¬ 
teen air-chambers; showing the gibbosity of the shell and the slope of the sides toward the 
aperture. Columbus. 0. 
' Fig. 2. A smaller individual, much disturbed by compression, and showing some variation in the depth of 
the air-chambers, compared with the preceding. 
The specimen is from the lower limestone of the Upper Helderberg group, in the vicinity of 
Buffalo, N. Y 
