CRAPTOLITES OF NEW YORK, PART 2 



'3 



cially in Washington and Rensselaer counties, and Dale and Prindle in their 

 continuation of these studies have added considerably to the list of localities. 

 During the construction of the West Shore Railroad Hall secured for the 

 State Museum a very large collection of splendidly preserved graptolites — 

 in fact the best preserved Normanskill graptolites known to the writer — 

 from a cut near Glenmont station in Albany county, and the writer has 

 obtained large collections from Mount Moreno near Hudson, Columbia 

 county, and other localities, while Gurley has based his investigation of the 

 fauna on a large collection secured by him at Stockport, also in Columbia 

 county, N. Y. All these occurrences have demonstrated that the Normans- 

 kill fauna is probably not only present in a large area of the slate belt of 

 New York, but is also by far the most commonly met with of the graptolite 

 faunas of the shales and slates of eastern New York, while it is absent out- 

 side of the area of the former Appalachian basin, or from the central and 

 northwestern part of the State where the shale is replaced by the Trenton 

 limestone. 



The complete fauna, as known in this State, is given in the following 

 table which shows its distribution in the four principal localities. 



TABLE 1 GRAPTOLITES OF THE NORMANSKILL SHALE IN NEW YORK 



i Ptilograptus poctai nov 



2 Dictyonema spiniferum nov 



3 Odontocaulis hepaticus nov 



4 Desmograptus tenuiramosus nov 



5 Thamnograptus capillaris {Emmons) 



6 Cf. Protovirgularia dichotoma McCoy 



7 Didymograptus sagitticaulis (//<?//) Gurley.*.. 



8 D. serratulus {Hall) 



9 D. subtenuis {Hall) 



10 Azygograptus walcotti Laptuorth 



1 1 A. ? simplex nov 



►J 



3 'a 



X o 



go 



OTHER 



LOCALITIES IN 



NEW YORK 



none 

 none 

 none 

 none 



none 



Moordener kill 

 Lansingburg 



none 

 Lansingburg 



