Cambric Dictyonema Fauna of Slate Belt. 197 



the pebbles of the conglomerate in division 2, in which 

 case these divisions are not necessarily Lower Cambrian. 



Eudemann's result would appear not to agree with C. 

 D. Walcott's opinion of the limit of the Cambrian (see 

 page 953, fourth paragraph), for he, Walcott, would 

 include the Dictyonema Zone in the Lower Ordovician. 

 Moberg. has suggested a similar view of this Zone in 

 Scandinavia, but, as Eudeman has shown, it does not 

 apply in America. 



Dr. Eudemann seems to think it will be possible to 

 divide the Dictyonema Zone in America into two or three 

 sub-zones, as has been done for that of Europe in Sweden. 



Three plates are given to show the lithological aspect 

 of the Dictyonema beds on the Hoosic E. in New York. 

 The article is preliminary to a work on the Graptolites of 

 New York by this author. 



G. F. Matthew. 



