372 NEW YORK STATE MUSEUM 



Diaphorostoma pugnus nov. Naticopsis domanicensis, 



Keys. Timan 

 Callonema pilosa nov. Holopea decheni Holzapfel, 



Martenberg 

 Bellerophon Koeneni nov. B. tuberculatum d'Orb. Timan 



These lists suffice to demonstrate two important facts with regard to 

 the affiliation of the faunas : 



i The species of the lower faunas in the European and New York 

 expression are in many instances closely allied, but are seldom identical. 



2 Specific identities prevail in the upper faunas of both regions. 



RELATION" OF THE FAUNA TO THE BLACK SHALES 



The three bands of bituminous shales (four including the upper 

 Genesee slate) which are intercalated amongst the beds to which the 

 Intumescens fauna in New York is normal, arc not to be regarded as in any 

 sense the proper carriers of the fauna itself. The organic contents of these 

 beds are few — some Lingulas and Orbiculoideas, Pterochaenia 

 fragilis, Probeloceras lutheri, Bactrites, fish plates and plant 

 remains, other organisms seldom appearing save with some concurrent 

 change in the sediment with increase of lime or clay content, and doubt- 

 less for the most part those cited with other occasional remains have 

 dropped down into the black muds from the higher zone of more prolific 

 life. 



These bands of black shale are eastward outrunners from a more 

 continuous and extensive deposit of the same character farther westward. 

 One arm of this black shale deposit extends westward of New York north 

 of the Cincinnati dome through northern Ohio (Ohio shale) and into 

 Ontario about Kettle Point, Lake Huron, Bosanquet and the region south- 

 ward ; westward into northern and thence western and southern Indiana 

 (New Albany shale), Illinois and western Kentucky. Another reaches 

 southward, east of the Cincinnati dome, through eastern Kentucky and 

 eastern Tennessee into Alabama. Through this mass traces of lime bands 

 and nodules, or lime-bearing shales, have been seldom noted, and the fossils 



