PLATE XLIX. 



GyKOCERAS SPINOSnM. 



Page 3*2. 

 See Plates 47, 48, 98, 99. 

 Figr. 1. Lateral view of a large, compressed fragment, showing- the cui-vature of the tube and the depth of 

 the air-chambera. On the concavo-dorsal side the test is pi-eserved, ami shows the undulating, 

 lamellose lines of growth. Schoharie grit. Schoharie, N. Y. 



Gyeoceras validum. 



Page 38C. 

 See Plate 100. 

 Pig. 2. Lateral view of a large fragment, preserving the chamber of habitation and twenty-six attached 

 «ir-eh«mber8, showing the curvarture and form of the shell, with no trnres of a i>rominent orna- 

 mentation of the test preserved on the internal mould. Schoharie grit. Scholiarie, N. Y. 



