PLATE V. 



PAGE. 



Figs. 1-2. Gomphoceras Hyatti Whitf. 427 



3. Ventral view of the specimen figured on Plate IV showing: the breadth of the 

 specimen. , 



Fig. 2. Gomphoceras Sciotense Whitf. v 428 



2 t Diagram showing the form of the aperture and its relation to the body oftke 

 shell as seen in a top view of the specimen figured on Plate VI. 



