GRAPTOLITES OF NEW YORK, PART 2 3 r 



Plain. 1 The shales at Dolgeville, which are in the lower third of the Utica 

 shale contain only : 



'This is the " Dicranograptus ramosus," recorded by Professor Whitfield from the 

 mouth of the Oxtungo creek near Fort Plain, N. Y. He cites from this locality [1877, p.19] 

 Graptolithus (Monograptus) serratulus Hall, G . ( I > i p 1 o g r a p t u s ) 

 prist is Hall, G. ( dim ac o gr ap t u s ) bicornis Hall and G. (Dicrano- 

 graptus) ramosus Hall ; and infers from this faunule the homotaxy of the Normans- 

 kill and Utica shales. The occurrence of Didymograptus serratulus has not 

 been verified by later collectors and Lapworth remarks [1886, p. 171] that the form thus 

 identified was possibly a Leptograptus. 



Likewise the list of Utica graptolites published by Walcott [1890, p. 339] which is 

 obviously based on Whitfield's original determinations has not been verified by the 

 collections at our disposal. The following species are named : 



1 Didymograptus serratulus Hall 6 C. scalaris Hall 



2 Dicellograptus divaricatus Hall 7 Diplograptus pristis Hall 



3 Dicranograptus ramosus Hall 8 D. putillus Hall 



4 Climacograptus bicornis Hall 9 D. mucronatus Hall 



5 C. typicalis Hall 



Dr Gurley states in a manuscript note in regard to this list : 



" This list was compiled by me at Mr Walcott's request and to it I contributed my quota 

 of errors. (Nos. 2 and probably 3, which latter is not otherwise accounted for.) The 

 remainder were copied from a list in a previous paper by Mr Walcott, (The Utica Slate and 

 Related Formations, 1879, P-34> 35) which in its turn was compiled from the 'authorities.'" 



A similar faunule, viz : 



Climacograptus bicornis Hall 



Dicranograptus ramosus Hall 



Diplograptus mucronatus Hall 

 has been recorded by Beecher [1883, p. 78] from Black rock pond near Observatory hill, 

 Albany, N. Y. This is associated with a fair-sized mollusk-fauna indicating very late 

 Utican age. An inspection of the collection which is in the State Museum has shown that 

 the graptolite faunule consists of : 



Climacograptus putillus {Hall) 



Glossograptus ? eucharis (Hall) 



Diplograptus sp. ind. (probably foliaceus) 



It is, hence, in full accord with the associated forms and the graptolite faunules of 

 the neighborhood. 



