178 



NEW YORK STATE MUSEUM 



consists of incised vertical lines at irregular intervals, making very 

 flat and low elevated striae, some broad, some very narrow and 

 threadlike, all rather wavy and irregular in their course, large and 



Imili 



II 



AJiJJ 



Orthoceras norumbegae 



small interspaced without order. At wider intervals are deeper 

 longitudinal sulci. All are crossed by faint and irregularly dis- 

 tributed concentric lines. This style of exterior is highly unusual 

 and quite peculiar. 



Lower Devonic. Edmunds Hill, Chapman Plantation. Me. 



