498 NEW YORK STATE MUSEUM 



Utica shales, as declared bj Whitfield. These two, however, ap- 

 pear insignificant when compared with the great num'ber of dif- 

 fering graptolites in the two zones, specially when the entirely 

 different aspect of the two faunas is taken into consideration; for, 

 while the Normans kill fauna as to prevailing species and individ- 

 uals is characterized by branching forms, notably of the genera 

 Coenograptus, Didymograptus and D i c e II o - 

 g r a p t u s , the Utica shale fauna is almost entirely composed 

 of Diplograptidae and Climacograptidae and 

 bears in its genera and species a decidedly younger character 

 than the Normans kill fauna, as becomes apparent by a compari- 

 son with the vertical range of the same forms m Sweden and 

 Great Britain. In fact, to the time of his death Hall insisted on 

 the different age of the two faunas, as the writer can assert by 

 personal information froim the genial paleontologist. 



The concurrence of the two graptolites will indicate hardly 

 more than the Middle Champlainic (Siluric) or Mohawkian age of 

 the Normans kill beds. 



The Oohoes beds which Whitfield believes to be of equal age 

 with the Normans kill beds are homotaxial with the Lorraine 

 beds, as already suggested by the Trinucleus concen- 

 tric u s collected in them by Whitfield. They are evidently the 

 same beds from which Hall reports such typical Lorraine fossils 

 as Ambonychia radiata and in which also the writer 

 has found an undoubted Lorraine fauna. In regard to the Lor- 

 raine beds, however, which Whitfield supposes to occur close to 

 the Normans kill graptolite beds along the Normans kill, the 

 writer has not been able to obtain any data, but he believes the 

 small Diplograptus on which Whitfield principally bases 

 his "Correlation to be the Diplograptus putillus of the 

 Utica shale, which has been found by the writer in several locali- 

 ties farther up the Normans kill. 



C. D. Walcott 

 Four years later, in a paper read before the Albany institute 

 by C. D. Walcott (36a), the Normans kill beds were included in 

 the Utica slate (as "Utica slate 2 " — see the catalogue of fossils, 



