Report of the State Geologist. 



405 



is in the " Portage sandstone " at a distance of about 600 feet below the 

 limit currently assigned to the upward extension of these sandstones, 

 or 600 feet below the first Spirifer Verneuili fauna ; that, further, 

 this first Chemung fauna was underlaid, at a distance of a few feet, by 

 the last remnants of the Naples or Cashaqua fauna (op. cit., pp. 67, 68). 

 Wo may, then, regard the horizon of Bronteus senescens as being pretty 

 well up in the lower portion of the Chemung, and its appearance 

 nearly contemporaneous with that of Spirifer Verneuili. For our 

 American faunas this indicates a considerable progress into the upper 

 Devonian, succeeding the Guboides fauna (Tully limestone) and the 

 Intumescens fauna (Naples beds) which are distinctly separated in New 

 York, but usually commingled in England and on the Continent, and 

 constitute the primary stage of the upper Devonian. This is probably 

 the latest appearance recorded of the genus Bronteus. 



[The original specimen of this species has been presented to the 

 New York State Museum.] 



